1. Introduction
With its rich agricultural heritage, Iran is recognized as one of the world’s most ancient historical farming regions [
1]. The economic foundation of this country is strongly dependent on agribusiness [
2,
3]. Iran’s agribusiness revenue is predicted to increase significantly, from USD 86.25 billion in 2023 to USD 135.70 billion in 2028 [
4]. In the fiscal year ending March 2023, Iran exported a total of USD 5.2 billion worth of agricultural products, accounting for 6.37% of its total non-oil exports [
5]. Moreover, the agricultural industry constituted around 16% of Iran’s overall employment [
6]. Even though this industry plays a positive role in the economic growth of this country, it has also had a number of adverse environmental consequences [
7]. One of the most urgent environmental issues that Iran is currently confronting is the severe threat of soil erosion [
8]. The current estimated rate of soil erosion in Iran is 16.5 tons annually, which is five times higher than the average worldwide rate [
9]. Soil erosion, as defined by the food and agriculture organization (FAO) of the United Nations (UN), refers to the accelerated loss of topsoil from the land’s surface via water, wind, and cultivation [
10]. The process of soil erosion can be significantly contributed to and expedited through unsustainable human practices, particularly agricultural intensification, the destruction of forests, and excessive pasture usage, as well as unsustainable land use [
10]. Soil erosion detrimentally affects the long-term sustainability of farmlands [
11].
Fortunately, environmental concerns such as soil erosion can be effectively addressed through the implementation of organic agricultural practices [
12,
13,
14], which is an essential component of sustainable development [
15,
16]. Organic-based agriculture offers solutions for the majority of challenges encountered in modern agriculture and food production, which ensures improved soil health and the sustainability of ecosystems [
17,
18,
19]. The implementation of organic practices in the agriculture industry, which excludes the usage of synthetic fertilizers, is projected to result in a 40% reduction in nitrous oxide emissions from the soil per hectare [
20]. In this regard, Skinner et al. [
21] conducted experimental research in Switzerland to determine the distinctions and impacts of organic and non-organic agricultural practices. The results obtained from their investigation demonstrate that organic agricultural systems yield 40.2% less nitrous oxide emissions per hectare.
Organic foods are defined as foods and beverages that adhere to organic production regulations [
19]. Iran’s primary organic food products consist of saffron, pistachios, dates, walnuts, peaches, apples, olives, pomegranates, rice, tomatoes, potatoes, carrots, safflower, figs, and roses, as well as medical herbs [
22]. Evidently, there has been a worldwide increase in customer demand for organic food products [
23], and consumers’ environmental and health concerns have become a significant factor driving this trend [
24]. However, despite the global trend towards organic food production and consumption to improve human health and sustainability, there have been no significant efforts to organize and promote organic agriculture in Iran [
25].
Even though organic agriculture has made progress in Iran [
22,
26], it still only makes up slightly more than 0.015% of the country’s total agricultural acreage [
27], which is significantly lower than the global rate of 1.6% [
27]. Moreover, the current developments in Iran’s agricultural sector are still far from meeting the target set in Iran’s vision 2025, which aims to achieve a 25% compliance with organic agriculture principles [
22]. One of the primary reasons for the comparatively small size of the organic food industry in developing countries, such as Iran, is the lack of readily available sales and marketing channels [
28,
29,
30,
31]. Notwithstanding, organic food businesses might overcome challenges caused by limited access to conventional retail markets by expanding their operations toward social commerce marketing through social networking sites (SNSs) [
32,
33].
Social commerce (SC) is an emerging technology within the realm of electronic commerce (e-commerce) that leverages SNSs to facilitate online commerce activities and transactions [
34]. The advent of SC technologies has transformed the landscape of online shopping by fostering robust connections between online businesses and their customers [
35]. Meanwhile, the popularity of SNSs facilitates the global expansion of SC [
36], allowing customers to purchase online while also exchanging information, such as commenting on their shopping experiences and rating their overall satisfaction [
37].
In 2022, the SC sector approximately generated USD 728 billion in income globally [
38]. This number is anticipated to show a compound annual growth rate (CAGR) of 31.6% from 2023 to 2030 and reach around USD 6.2 trillion by the end of this period [
38]. This figure underscores the significance of SC and emphasizes the importance of acknowledging its potential for businesses. Moreover, the crucial role of SC in promoting socio-economic stability is increasingly being recognized in the context of the COVID-19 pandemic and its aftermath [
39,
40,
41]. Although there is considerable potential for the development of the organic food industry through SC platforms [
42,
43], there remains a lack of understanding regarding the factors that influence customers’ behaviors in relation to using such platforms for purchasing organic food products [
33,
42,
44].
In Iran’s agribusiness sector, the intense competition in the e-commerce market and highly perishable nature of organic foods have led to the rapid growth of Instagram as an effective platform for consumers to buy organic foods [
32]. Instagram is one of the most popular social networking platforms in the world, particularly among Iranian users [
45,
46]. In 2022, the value of SC on Instagram in Iran was estimated to be USD 84.4 million [
47]. This platform was especially important to Iran’s economy during the COVID-19 pandemic [
48]. Leveraging Instagram as an SC platform for marketing and selling products and services is an emerging field of knowledge [
49]. Thus, given the unique characteristics and functionalities of each SNS [
50], Instagram was selected for this research to minimize potential biases that may arise from choosing multiple platforms.
The unified theory of acceptance and use of technology (UTAUT-2) [
51], is employed as the theoretical foundation for the research model due to the fact it fulfills the underlying notion of this study, which is exploring costumers’ behavioral intentions and actual behaviors towards using Instagram social commerce technology for purchasing organic food products. Based on the literature reviews, the UTAUT-2 is one of the most comprehensive theories/models in the realm of individual consumer technology acceptance and usage behaviors owing to its holistic approach [
52]. Moreover, UTAUT-2 has been tested in numerous studies, all of which have found it to be valid in explaining an individual’s technology adoption in consumption circumstances [
53,
54,
55].
The primary objective of this research is to address the knowledge gap in the field of organic food marketing, with a particular emphasis on SC via the Instagram platform. The findings of this study can greatly assist organic food businesses in enhancing the purchasing experience for their customers and optimizing their SC strategies.
This article is organized as follows: It commences with a synopsis of the SC literature and organic food sector. After presenting the research hypotheses and model, the research methodology and statistical analysis results are detailed. The paper concludes with research implications, limitations, and recommendations for future studies.
2. Literature Review
SC technology is commonly regarded as an extension of e-commerce that is enhanced through web 2.0 (internet 2.0) capabilities and facilitates more user interaction and engagement [
56]. The concept of SC was first used in 2005 when Yahoo.com launched “Yahoo Shoposphere” to describe a new collaborative shopping mechanism on its webpage [
57]. Four years later, Flowers.com, which was a flower and gift business, established the first Facebook-based online marketplace in 2009, the formal launch of SNS-based commerce [
58]. Scholars from various academic disciplines, ranging from social science, ICT, and marketing to consumer behavior, have been conducting studies exploring SC technologies [
59]. The early studies predominantly centered on SC inception, distinguishing features, and architectural designs [
60]. The current SC literature, however, primarily investigates the related variables that impact customers’ purchasing intentions and behaviors [
59].
In light of the rising popularity of SNSs [
61], and the growing usage of SC technologies [
62], the organic food industry today has an unprecedented opportunity to develop and prosper by leveraging SNS-based SC technologies for marketing and selling their products [
42,
43]. However, there has been a scarcity of research that focuses on how consumers of organic food products perceive SNS-based SC as an online commerce channel for purchasing these products [
33]. Furthermore, despite the vital role that consumers’ trust plays in SC [
63], its determinants are still inadequately comprehended [
64,
65], especially in the Middle East’s SC sector [
66].
In addition, the current literature regarding the impact of social media influencers’ (SMIs) endorsements on customers’ online purchase intention is limited [
67]. Particularly, additional investigation is required to ascertain how SMIs-based marketing influences consumers’ behaviors in SC contexts [
68,
69]. Meanwhile, the overwhelming majority of previous studies on SMIs-based marketing have concentrated on the apparel, cosmetics, and tourism businesses [
68]. Therefore, this is a need for further research into the possible effectiveness of influencer-based marketing in other sectors, including the food industry [
70]. Moreover, the existing SC studies have overtly focused on customers’ purchase intentions as a proxy for their purchasing behaviors, neglecting the long-existing intention–behavior gap [
71,
72,
73], which has limited their practical applications [
74].
In order to address the aforementioned gaps, this study aims to investigate the underlying mechanisms that affect customers’ SC trust and behavioral intentions toward buying organic food products through the Instagram platform. The notion of customers’ trust is complex and has multiple aspects [
63]. However, the present study concentrates specifically on the institutional dimension of trust that underlies Instagram as an SC platform. Hence, the combined questions in this research can be framed as follows: What are the determinants within the Instagram SC context that shape the customers’ SC trust and their intention to engage in purchase behaviors on this platform, and how do these determinants impact their actual purchasing behaviors?
To ensure a comprehensive examination of the research questions, this study incorporated management-, person-, and technology-related factors. This research primarily examined the phenomenon of Instagram social commerce within the organic food industry at a managerial level. The factors classified within the person-related dimension encompass SC constructs, social media influencer endorsement, social influence, SC trust, purchase intention, and purchasing behaviors. Ultimately, the technology component encompassed elements such as the platform’s accessible resources and capabilities for conducting online purchases. Accordingly, this paper explores a variety of social, technical, and socio-technical factors in an effort to develop a comprehensive framework that can be used to better understand the trust, intentions, and behaviors of the customers who employ Instagram as an SC platform for purchasing organic food products.
3. Development of Hypotheses and Research Model
Venkatesh et al. [
51] define performance expectancy (PE) as practical utilities that impact an individual’s inclination to adopt new technologies. PE has been identified as an important determinant of customers’ purchase intentions in various online commerce channels, including omnichannel technology [
75], fresh e-commerce platforms [
76], online group buying platforms [
77], and SC platforms [
78]. Hence, it can be assumed that the customers’ perceptions of Instagram’s SC performance in relation to purchasing organic food products will have a direct impact on their purchase intention (PI), as well as an indirect impact on their purchasing behavior (PB) through the mediating role of PIs. Hence, the following hypotheses are formulated:
H1a. PE has a positive and significant effect on PI.
H1b. PE mediates the relationship between PI and PB.
The concept of effort expectancy (EE) describes a user’s perception that a given technology is relatively simple to learn and use [
51]. EE is recognized as a key factor affecting customers’ purchase intentions across e-commerce technologies, such as online open market platforms [
79], m-commerce applications [
80], and SC platforms [
78]. Therefore, this study postulated that consumers’ perceptions regarding Instagram’s ease of usage with regard to purchasing organic food products will significantly impact their purchase intentions, as well as their actual purchasing behaviors through the mediating role of PI. Accordingly, the following hypotheses have been developed:
H2a. EE has a positive and significant effect on PI.
H2b. EE mediates the relationship between PI and PB.
As defined by Venkatesh et al. [
51], facilitating condition (FC) pertains to the users’ perceptions regarding the extent to which a particular technology can assist them in effectively completing specific tasks. FC serves as a fundamental predictor within the UTAUT-2 model, influencing users’ intentions towards using new technologies [
81]. It has been determined that platform-facilitated purchasing conditions favorably impact the customers’ SC-based purchase intentions [
82,
83]. In the context of the current research, it is essential to take into consideration the recent developments in the SC capabilities of the Instagram platform [
84]. These enhancements aim to streamline customers’ online purchasing experiences [
85]. Therefore, it can be expected that Instagram’s SC facilitators have a direct impact on PI, as well as an indirect impact on PB via the mediating mechanism of PI. This line of reasoning resulted in the subsequent hypotheses:
H3a. FC has a positive and significant effect on PI.
H3b. FC mediates the relationship between PI and PB.
Hedonic motivation (HM) refers to the perception of enjoyment derived from using technologies [
51]. The consumers who enjoy using Instagram for SC purposes have been reported to be significantly more inclined to purchase available products [
49]. In this regard, Rahman et al. [
65] stated that HM positively and significantly impacts a customer’s propensity towards using SC platforms for purchasing perishable food products. Therefore, it can be anticipated that the hedonistic motives behind purchasing organic food products using Instagram social commerce directly impact customers’ purchase intentions and indirectly impact their purchasing behaviors through the mediating role of PI. The aforementioned discussion resulted in the development of following hypotheses:
H4a. HM has a positive and significant effect on PI.
H4b. HM mediates the relationship between PI and PB.
The phenomenon in which the views of their peers influence an individual’s decision to adopt and use a particular technology is known as social influence (SI) [
51]. The impact of SI on customers’ purchasing intentions across different online commerce technologies has been highlighted in earlier studies [
65,
86]. Moreover, it has been indicated that SI has favorable influence on customers’ SC trust [
87]. In this regard, Maulida et el. [
88] stated that SI significantly affects customers’ trust towards SC on the TikTok platform. In addition, SI holds significant relevance in current research due to the fact that Middle Eastern nations are typically characterized as collectivist cultures [
89]. As a collectivist society, the decision-making processes of the Iranian people are profoundly affected by their social circles [
89,
90]. In light of these considerations, this study posits that SI has a favorable influence on both PI and SCT, as well as an indirect effect on PB via two mediators: PI and SCT. Accordingly, the following hypotheses have been formulated:
H5a. SI has a positive and significant effect on PI.
H5b. SI mediates the relationship between PI and PB.
H6a. SI has a positive and significant effect on SCT.
H6b. SI mediates the relationship between SCT and PB.
Social commerce constructs (SCCs) refer to the functionalities that have been added to e-commerce platforms with the aim of enhancing their interactivity [
91]. This study investigated two components of SCCs: recommendations and referrals (RERs), and ratings and reviews (RARs). These SCCs are determined to have a positive impact on customers’ SC-based purchase intentions [
41]. In addition, it has been stated that SCCs can help customers to manage the overwhelming amount of information in SC platforms and focus on the appropriate products and merchants [
92]. In turn, perceived knowledge develops customers’ trust towards the SC platforms being used [
93]. Hence, this study hypothesized that SCCs have favorable influence on PI and SCT, as well as an indirect effect on PB via two mediators: PI and SCT. Accordingly, the following hypotheses have been developed:
H7a.
RERs have a positive and significant effect on PI.
H7b.
RERs mediate the relationship between PI and PB.
H8a.
RERs have a positive and significant effect on SCT.
H8b.
RERs mediate the relationship between SCT and PB.
H9a.
RARs have a positive and significant effect on PI.
H9b.
RARs mediate the relationship between PI and PB.
H10a.
RARs have a positive and significant effect on SCT.
H10b.
RARs mediate the relationship between SCT and PB.
Social media influencers (SMIs) are people who actively participate in creating and sharing information on their social media accounts and have become renowned for their expertise in various fields, such as fashion, beauty, fitness, and health [
94]. Endorsements are widely employed by businesses in prominent SMI-based marketing strategies to promote their products [
95,
96,
97]. A social media influencer’s endorsement (SMIE) is found to be a significant determinant of customers’ purchase intentions across online commerce technologies, including as e-commerce [
67], and SC platforms [
88]. Moreover, there seems to be a notable correlation with consumer trust regarding SMIs and the technology that they endorse [
98]. Given that Instagram is a popular platform for SMI-based marketing [
96,
99], this study posits that SMIEs enhance both PI and SCT. In addition, it has been stated that SMIEs have a significant impact on SC customers’ purchasing behaviors [
100]. Therefore, it is expected that SMIEs will favorably affect PB both directly and indirectly through the mediating roles of two factors: SCT and PI. The aforementioned considerations resulted in the development of the following hypotheses:
H11a.
SMIEs have a positive and significant effect on PI.
H11b.
SMIEs mediate the relationship between PI and PB.
H12a.
SMIEs have a positive and significant effect on SCT.
H12b.
SMIEs mediate the relationship between SCT and PB.
H13.
SMIEs have a positive and significant effect on PB.
Social commerce trust (SCT) refers to customers’ perceptions of the provided assistance and support on a given SC platform, which simplifies their online purchasing experience [
64]. It has been argued that trust facilitates online transactions in SC settings [
66,
101]. Moreover, it has been stated that trust positively influences customers’ SC-based purchase behaviors [
102]. Accordingly, this study proposes that SCT significantly influences PB. Hence, the hypothesis that follows is developed:
H14.
SCT has a positive and significant effect on PB.
It has been determined that consumers’ behavioral intentions regarding using online commerce platforms play a crucial role in shaping their subsequent usage behaviors [
103]. This research posits that customers’ behavioral intentions towards using the Instagram platform for purchasing organic food products significantly and positively impact their subsequent purchasing behaviors. Accordingly, the following hypothesis is proposed:
H11.
PI has a positive and significant effect on PB.
The credibility of the UTAUT-2 as one of the most comprehensive models for explaining the technology acceptance and usage behaviors of individual consumers [
104] makes it the most suitable model for current investigation. Notwithstanding, in order to further enhance the applicability of the UTAUT-2 model in the context of SC on Instagram, this study expanded it through incorporating SCCs and SMIEs as novel exogenous constructs. In addition, SCT has been introduced as an additional mediation mechanism within the UTAUT-2’s framework. This study further considers the impact of three demographic variables, namely, customers’ age, gender, and frequency of using SC (SCF), in order to perform a thorough analysis and ensure that the empirical findings are not influenced by other factors. Accordingly, a thorough analysis is conducted on the paths through which consumers’ usage of Instagram social commerce is influenced by SCT, SMIEs, and PI. Throughout these interactions, various aspects are taken into account, including sociability, practicality, and the alignment between the socio-personal and technological elements.
Figure 1 illustrates the model constructed for this research.
6. Discussion of Key Findings
In relation to the UTAUT-2-based factors, the results of this research indicate that facilitating conditions, hedonic motivations, and social influence all have a significant and positive impact on consumers’ purchase intentions, which in turn, indirectly influences their purchase behaviors through the mediation role of purchase intention. The study’s outcomes further demonstrate that social influence plays a significant and positive role in boosting consumers’ social commerce trust, which in turn functions as a mediating factor to indirectly affect consumers’ purchasing behaviors. This outcome is consistent with the conclusions of earlier investigations that have been carried out in the context of social commerce through social networking platforms [
87,
88].
Nevertheless, it was determined that neither the direct effects of performance or effort expectancies on purchase intention nor their indirect effects on purchase behavior through the purchase intention’s mediation role were statistically significant. These outcomes bring up the question of why these influential constructs in the UTAUT-2 model did not have any significant impact in the context of current investigation. One possible explanation for the obtained results is that the impact of the UTAUT-2 components is subject to variation depending on the specific conditions and populations under investigation [
124]. For example, effort expectation has had a substantial impact on social commerce customers in the contexts of Sweden [
125], France [
126], Spain [
127], and China [
78], whereas its impact has not been significant in some other research populations, such as Tunisia [
128], Turkey [
129], Indonesia [
130], Vietnam [
131], and Qatar [
132]. In the scope of current research, the possible explanation for the insignificant effects performance and effort expectancies might be that Instagram is the most popular social network site in Iran [
133] and the preferred platform for social commerce [
48,
134]. Given these circumstances, Iranian customers may not prioritize the ease of use and social commerce performance of Instagram, as they are already familiar with it and proficient in utilizing the platform’s commercial functionalities.
Concerning the social commerce constructs, it has been found that, in contrast to recommendations and referrals, which had no significant effect on purchase intentions, the influence of ratings and reviews on customers’ purchasing intention was determined to be significant. On the other hand, customers’ social commerce trust is significantly and favorably influenced by recommendations and referrals, whereas the impact of ratings and reviews on customers’ social commerce trust was statistically insignificant. Furthermore, the mediation analysis results indicated that recommendations and referrals have a substantial and positive impact on consumers’ purchasing behavior through the mediating role of social commerce trust, whereas ratings and reviews did not have any significant indirect effect on consumers’ purchasing behaviors. These finding are especially important considering the fact that companies aim to gain a competitive edge by establishing effective social commerce constructs early on, rather than allocating their limited resources evenly across all components [
135]. Based on these outcomes, recommendations and referrals from acquaintances are more valuable to social commerce customers than reviews and ratings posted by anonymous users.
In addition, the current research underscores the significance of influencer marketing, particularly through influencer endorsement mechanisms in the context of Instagram social commerce. The findings of this study demonstrate that customers’ intentions to purchase organic food products on Instagram and their social commerce trust are both significantly impacted by influencer endorsement. These results are consistent with the findings of several earlier investigations [
67,
88]. Moreover, in accordance with Fakhreddin and Foroudi [
100], this study’s results revealed that the impact of influencer endorsement on social commerce consumers’ purchasing behaviors is significant. The mediation analysis outcomes further revealed that the indirect effects of influencer endorsement on customers purchasing behaviors are statistically significant. Purchase intention and social commerce trust acted as mediators for these indirect effects. This builds upon the findings of Alotaibi et al. [
111], which demonstrated that influencer marketing enhances customers’ trust in Instagram social commerce along with their intentions to make purchases using the platform.
Moreover, in line with the findings of Zhao et al. [
136], the current study’s results demonstrate customers’ social commerce trust significantly affects customers’ behaviors towards using this platform for the purpose of purchasing organic food products. These findings expand on the conclusions of the research conducted by Liu et al. [
137], which stated that the customers’ trust in SC platforms plays a significant role in shaping their purchase intentions.
Finally, in accordance with the findings of Mutambik et al. [
138] and Vatanasakdakul et al. [
139], this study determined that a significant correlation exists between the customers’ behavioral intentions to use Instagram to purchase organic foods and their subsequent actual purchasing behaviors.