1. Introduction
As a result of the wide usage of social media, there is now a de facto omnipresence of material that has been developed and distributed by consumers [
1], which has led to new communication phenomena [
2]. People share their knowledge and experiences on social media sites. It is interesting to note that scientific research suggests that customers are inclined to have unconditional trust in material posted on social media [
3]. On the other hand, in addition to the content that companies provide, there are a number of other sources, such as weak and strong ties, offering perspectives and information on goods and services available on social networking sites. Additionally, in today’s society, celebrities and people who wield great power on social media play a significant role in determining how their followers feel about certain products.
There is nothing novel about the concept of using opinion leaders as a means of exerting influence over the decisions that customers make. People who have a stronger position, social prominence, personal attractiveness, or knowledge have a significant amount of influence on the attitudes and behaviors of customers; they are referred to as opinion leaders [
4]. Opinion leaders may be described as individuals who have a significant impact on the attitudes and behaviors of consumers [
5,
6]. Hiring famous people, such as actors, a technique used to increase marketing communications, is a marketing tactic that has been well established over the last few decades [
7].
Many scholars have proved that there are other important factors playing a role in decision-making behavior, such as perceived value and perceived enjoyment, which are essential in predicting purchase intention [
8,
9,
10,
11,
12,
13]. In addition, word of mouth (WOM) is a social concept used in referral marketing to capitalize on interpersonal connections. It is beneficial to analyze social relationships by relying on social ties to gain a better understanding of how recommendation flow works [
14]. eWOM, which may take the form of online evaluations or the exchange of messages and experiences, is dominant on online social networking platforms.
Academics believe that sending messages via social media, such as Facebook, is a form of providing eWOM. This is because these sites provide a channel through which it is feasible to offer advertisements for businesses over a longer time [
15]. However, eWOM might emerge from anybody (e.g., close friends, seldom contacted acquaintances, or complete strangers). A social tie is an umbrella notion that encompasses the procedure of accumulating social capital results [
16]. Tie strength is a multidimensional concept that depicts the power of dyadic interpersonal interactions within the framework of social networks. Some of the aspects that determine the strength of these ties include proximity, closeness, reinforcement, and connection. The strength of the connection may vary from strong (e.g., a close friend) to weak (e.g., a rarely contacted acquaintance), depending on the amount and kind of resources exchanged within the relationship, the frequency of those exchanges, and the degree of intimacy present within those exchanges [
17]. Not to mistaken celebrities with weak-ties, the celebrity relationship is based on parasocial relationships, which are imaginary relationships with media stars that start by following their news and develop a one-sided relationship where the follower knows the media star very well; however, the latter knows almost nothing about the follower [
18].
Scholars around the world have studied eWOM heavily in the past decade. However, when looking in the literature for social ties eWOM, all studies looked at weak-tie eWOM (from here on W-tie) and strong-tie eWOM (from here on S-tie) as one construct. In other words, W-tie and S-tie have always been studied in contrast to each other. The versus characteristics of these two constructs have been considered in almost all studies. Researchers developed conceptual frameworks and included them as either independent variables (e.g., [
19,
20,
21,
22,
23,
24,
25]) or as moderation variables (e.g., [
26,
27,
28,
29,
30]). In their methodology, they studied different groups (strong-tie group and weak-tie group) and then compared the results. Alternatively, one group was exposed to different scenarios (strong-tie scenario and weak-tie scenario) before comparing the results. The reader always considers them bonded together at the same level as the model. Nonetheless, the S-tie and the W-tie may work together in a different spectrum. For example, if we are exposed to an opinion from a close friend while receiving a counterargument from a stranger on social media regarding a product, will the effect of the opinion from the close friend differ? What about the recommendations from celebrities we admire? Will W-tie moderate the effect of other eWOM sources? What about the perceived value and enjoyment we have developed in our minds? Does their effect on purchase intention change with high or low levels of W-tie? Only one study altered the mechanism and studied S-tie as an independent variable and W-tie as a moderation variable [
31]. This research builds on that study and adds celebrity eWOM, perceived value, and perceived enjoyment as mediating variables.
4. Discussion
This study investigated how strong-tie, weak-tie, and celebrity eWOM work together to affect consumers’ purchase intentions by studying the moderation effect of the W-tie and the mediation effect of perceived value and perceived enjoyment on consumers’ purchase intentions. Currently, social media platforms play a pivotal role in all aspects of our lives, and consumers rely heavily on the recommendations and experiences of their peers and even strangers. Accordingly, brands spend billions of dollars on celebrities for access to their followers by promoting products and services [
93]. The empirical results supported numerous hypotheses, and all the direct relationships in the model were supported. Specifically, our findings demonstrate that the S-tie has a significant effect on perceived value. Consumers share many common characteristics with their strong ties, usually hold a soft spot for them, and often consider them to be trusty advisors. This, in turn, affects their judgment regarding the perceived value of most products and services. These results are in line with previous studies in various contexts [
31,
94,
95,
96,
97]. A study conducted by [
31] found that the S-tie affects perceived value. Likewise, the authors of [
94] found that eWOM C2C conversations affect perceived value. In addition, similar results from the study by [
95] noticed that eWOM between social ties on social commerce platforms affects platform customers’ perceived value. In another context, the authors of [
96] found that eWOM significantly affected tourists’ perceived quality in Indonesia. Furthermore, the authors of [
97] found that eWOM affected customers’ perceived value in the altruistic service context.
Our findings showed that the S-tie affects perceived enjoyment. We believe that when consumers hear positive or negative experiences about products and services from their S-tie circle, either as direct online conversations or by reading reviews or ratings, they will begin to imagine how their experience will be when consumption occurs. The results of this research are aligned with similar results from previous studies. In a social commerce context, a study conducted by [
98] found that eWOM affects perceived enjoyment. Similar results were found by [
48] when they studied the influence of eWOM on purchase intentions in the Taiwanese laptop industry. Additionally, the authors of [
45] found that eWOM accurately affects the future enjoyment of consumption for different product categories, especially when there are similarities between the sender and receiver. Furthermore, in the luxury hotel industry, [
99] found that eWOM has a significant predictive effect on perceived enjoyment for Generation Y customers. However, the authors of [
100] had contradictory results, as they found that positive eWOM does not predict perceived enjoyment. Nevertheless, they found that eWOM quality, such as in-depth reviews, had an impact on perceived enjoyment.
Another finding showed that the S-tie significantly affects purchase intentions. Consumers seek advice from trusted peers to reduce the risks associated with potential purchases. As previously mentioned, closeness, and trust between individuals and their S-tie peers will affect their judgment regarding products and services, as it will affect their purchase intention. Previous studies regarding eWOM in general terms, regardless of tie strength, showed mixed results regarding the effect of eWOM on purchase intentions. Research conducted by [
99], they found that eWOM does not affect purchase intention in luxury hotels. Moreover, eWOM does not affect the purchase intentions of organic food products [
101]. In contrast, eWOM was found to affect purchase intentions (e.g., [
102,
103,
104]). Additionally, S-tie has been found to affect purchase intentions in several studies [
19,
25,
31,
105].
Furthermore, the findings showed that celebrity eWOM significantly affects perceived value. Consumers have an affinity for and admiration for celebrities. Consequently, the brand messaging that celebrities share becomes more credible, which leads to a higher perception regarding product value. The results of this study are in line with previous studies [
76,
106,
107]. Additionally, celebrity eWOM significantly affects perceived enjoyment. Celebrities’ messages trigger consumers to develop emotional engagement and imagine how they will enjoy the experience with those products or services, as supported by previous studies [
64,
108,
109]. Moreover, celebrity eWOM significantly affects purchase intention. The attraction that consumers hold for celebrities will drive them to attempt to mirror celebrities they admire, which includes endorsed products and services. This, in turn, will lead to the intention to buy such products to impersonate the celebrity. Surprisingly, these results contradict what the authors of [
110] found when they studied the packaged coffee market. Their results highlighted that celebrities’ endorsements did not directly affect purchase intention. Likewise, another study conducted by [
111] for Vanilla Hijab found that celebrities’ endorsements did not affect purchase intention directly. However, in both studies, they found that celebrities’ endorsements affected other important antecedents of purchase intention, such as brand loyalty, brand attitude, and brand credibility. Still, many studies have found that celebrities’ endorsements have significant effects on purchase intention [
107,
108,
112,
113,
114]. Interestingly, from a statistical point of view, the results of this research showed that the effect of celebrity eWOM was considerably higher than that of S-tie. For instance, when comparing the β-values for their effect on perceived value, celebrities eWOM β = 0.209, while S-tie β = 0.82. When comparing their effect on perceived enjoyment, celebrities eWOM β = 0.388, while S-tie β = 0.123. Lastly, for their effect on customers’ purchase intention, celebrities eWOM β = 0.209, while S-tie β = 0.132. These results come as no surprise, as consumers view celebrities as role models. The authors of [
61] argued that the celebrity conveying the brand’s message affects purchasing behavior, especially for younger consumers.
Another aim of the study was to test whether perceived value and perceived enjoyment mediated the relationships between the independent and dependent variables of the model. The results showed that not all hypotheses were accepted. Both variables have a significant direct effect on purchase intention. When consumers value brand offerings and perceive that they will enjoy their future consumption, this, in turn, will increase their purchasing intent. These results are similar to those of previous studies, as the authors of [
11,
31,
115,
116] found that perceived value is an important variable in predicting purchase intention. Furthermore, previous studies have revealed that perceived enjoyment has an effect on purchase intention [
64,
108,
109]. When it comes to the mediation effect results, perceived value only mediated the impact of celebrity eWOM on purchase intentions. In other words, perceived value did not successfully convey the effect of S-tie on purchase intentions, contradicting the results of [
31], which found that perceived value mediates the relationship between S-tie and purchase intention. Furthermore, the authors of [
117] did not find that perceived value mediates the relationship between celebrity endorsement and purchase intention. On the other hand, perceived enjoyment mediated both relationships. This result is in line with the results of [
118]. They found that hedonic enjoyment mediates the relationship between eWOM and purchase intention.
The final aim of the study was to test the moderation effect of W-tie on eight proposed hypotheses. The results showed that W-tie did not moderate the relationship of S-tie with regard to perceived value, perceived enjoyment, and purchase intention. Thus, consumers who value S-tie eWOM do not have their intentions swayed by what is written on social media platforms. This result also contradicts the findings in [
31], which indicated that W-tie negatively moderates the relationship between S-tie and purchase intention. This contrast may stem from differences between Jordanian and Chinese cultures. On the other hand, W-tie moderated the relationship between celebrity eWOM and perceived value, perceived enjoyment, and purchase intention, as well as the relationship between perceived value and perceived enjoyment and purchase intention. These results are in line with those of [
31], which found that W-tie moderates the relationship between the mediation effect of perceived value and purchase intention. Our results indicate that the effects of celebrity eWOM, perceived value, and perceived enjoyment depend on the level of W-tie. When W-tie is high, the effect becomes stronger, and vice versa; when W-tie is low, it will reduce the effect of celebrity eWOM on perceived value, perceived enjoyment, and purchase intention due to internal conflicts and dissonance. The same applies to the effects of perceived value and perceived enjoyment with regard to purchase intention.
4.1. Theoretical and Practical Contribution
This research examined how different sources of eWOM (e.g., S-tie, celebrity eWOM, and W-tie) interact to affect customers’ purchase intentions by studying the moderation effect of W-tie and the mediation effect of perceived value and perceived enjoyment on consumers’ purchase intentions. Most studies have measured tie strength (i.e., strong/weak) as one construct. The versus characteristics of these two constructs were considered in almost all studies. Past studies have combined tie strengths at the same level of the model, either as an independent variable (e.g., [
19,
20,
21,
22,
23,
24,
25]) or as a moderation variable (e.g., [
26,
27,
28,
29,
30]) in different contexts. In their methodology, different groups (e.g., strong-tie groups and weak-tie groups) were studied, or one group was exposed to different scenarios (e.g., strong-tie or weak-tie eWOM) before comparing the results. This research delivers new knowledge to the body of literature regarding the mechanism of eWOM sources by considering S-tie and W-tie separately. The results showed that W-tie moderated the positive impact of celebrity eWOM, indicating how brands may manage their efforts to increase the value of their products and services to consumers.
From a statistical point of view, the results revealed a stronger effect of celebrity eWOM than S-tie on consumers; thus, brands should utilize them in their marketing strategies. However, the impact of the S-tie on consumers must not be neglected. Easy access to the internet is resulting in stronger social influence than ever before, and marketers should be aware that consumers are relying on eWOM information that aids their decision-making processes. Marketers should have a presence wherever their customers are on the internet. This does not necessarily apply solely to official brand pages and forums, but rather to all third-party accounts, pages, and platforms where consumers are online. This will offer brands the opportunity to better understand their customers and adjust their future offerings. Additionally, brand managers should make it easy for consumers to be in touch with comments or questions. Neglecting will increase negative eWOM and damage brand value. On the contrary, sincerely listening to customers’ complaints and finding ways to solve their problems will change negative views into positive ones. In addition, marketers should drive customers to boost positive experiences through comments and reviews. Running simple contests and rewarding customers who review is an adequate approach to obtaining help from customers and giving them a reason to share their brand experiences.
It is necessary for any organization to be sustainable in business. Therefore, brands should improve the customer experience and retention. Although technology provides consumers with various ways to communicate and learn about products and services, it also gives brands the opportunity to monitor and evaluate consumers’ conversations, comments, and feedback posted on the internet. Harvesting this opportunity will ensure that brands can achieve favorable long-term results.
4.2. Limitations and Future Research
All studies have their own set of limitations that should be acknowledged. First, this study did not consider a specific product category in the market, and different categories may produce different results. Second, we studied perceived value as an aggregate construct, despite its many sub-dimensions, such as price, quality, emotional value, and social value. Third, the results of the study cannot be generalized due to the sampling method applied.
Future research could conduct a multigroup analysis according to gender and age group. Gender differences play a pivotal role in different aspects of consumer behavior, ranging from information processing to purchase intentions [
119]. Moreover, gender differences impact decision making [
120]. In a recent systematic review [
121], it was concluded that there are more differences than similarities between genders in the online context. Furthermore, age is also an important element in purchase decisions [
122], with variations in engagement and motivation according to age [
123]. However, studies have revealed that the effects of age differences vary according to context [
124].