Electronic word-of-mouth (eWOM) has become one of the most significant drivers of consumer decision-making in the digital landscape (Erkan & Evans, 2016). Unlike traditional advertising, eWOM is based on consumer-generated content, such as online reviews, recommendations, and social media discussions, making it a more trusted source of information for potential buyers. Research has demonstrated that eWOM positively influences purchase intention, with its effect being further amplified by strong brand equity (Putri, Darpito, Oetomo, & Sutanto, 2025). This study aims to analyze the influence of eWOM on purchase behavior, particularly in the context of brand equity, which serves as a moderating factor that enhances the impact of eWOM on consumer trust and purchase decisions (Jalilvand & Samiei, 2012).

Defining Brand Equity and Its Role in Digital Marketing
Brand equity refers to the value and strength of a brand as perceived by consumers, which influences their purchasing decisions and loyalty (Aaker, 1991). Aaker (1991) defines brand equity as a set of assets and liabilities linked to a brand that enhances or detracts from the value provided to consumers and the firm. These assets include brand awareness, perceived quality, brand associations, and brand loyalty. High brand equity means consumers recognize and trust the brand, are more likely to choose it over competitors, and are willing to pay a premium for it (Keller, 1993).

In the digital era, brand equity remains a crucial factor in consumer behavior despite the rise of eWOM and peer-generated content (Kim & Ko, 2012). The sheer volume of information online makes it difficult for consumers to filter credible sources from noise, which is where strong brand equity becomes a key differentiator. High-equity brands benefit more from eWOM, as positive consumer-generated content is perceived as more credible when associated with a trusted brand (Jalilvand & Samiei, 2012). Furthermore, strong brand equity buffers against negative eWOM, as established brands tend to have higher consumer resilience in the face of occasional criticism (Zhang & Tran, 2024).

The Role of eWOM in Consumer Purchase Intention
As digital platforms become more integrated into everyday consumer behavior, eWOM has evolved into a critical touchpoint in the customer journey (Erkan & Evans, 2016). Consumer reliance on eWOM when making purchasing decisions has surpassed many traditional advertising methods (Alhidari, Iyer, & Paswan, 2019). The effectiveness of eWOM is largely attributed to its authenticity and peer-driven influence, as consumers tend to trust the experiences of other users over brand-generated messages. Studies indicate that positive eWOM increases the perceived value of a product or service, leading to higher levels of purchase intent (Erkan & Evans, 2016).

Jalilvand and Samiei (2012) emphasized that eWOM influences both brand perception and consumer attitudes, making it an essential element in modern marketing strategies. This effect is even more pronounced in industries such as e-commerce, hospitality, and technology, where consumer reviews significantly dictate market performance. The widespread use of social media platforms has accelerated the spread of eWOM, creating viral brand advocacy that can drive rapid market adoption (Kim & Ko, 2012).

Brand Equity as a Moderating Factor
While eWOM has a direct impact on consumer purchase behavior, its effectiveness is not uniform across all brands (Jalilvand & Samiei, 2012). Research suggests that strong brand equity amplifies the power of eWOM, making it more persuasive (Albayrak & Ceylan, 2024). Consumers are more likely to trust and act on eWOM when it aligns with a brand that already has a solid reputation, high awareness, and positive associations (Kim & Ko, 2012). This insight aligns with findings that well-established brands derive greater benefits from eWOM than lesser-known competitors (Zhang & Tran, 2024).

Brand equity enhances the credibility of eWOM messages, reducing consumer skepticism (Jalilvand & Samiei, 2012). In contrast, brands with weak equity may struggle to leverage eWOM effectively, as consumers are less likely to associate their recommendations with trust and quality. This moderating effect suggests that companies should prioritize brand-building efforts to maximize the ROI of eWOM marketing initiatives (Kim & Ko, 2012).

… The Strategic Power of eWOM and Brand Equity
In a world saturated with digital noise, electronic word-of-mouth (eWOM) has emerged as a powerful force shaping consumer behavior. But how exactly does it influence purchase decisions—and what role does brand equity play in amplifying or moderating its impact?