A Critical Review of Consumer Responses to Social Media Influencers

Abstract

The rapid growth of social media platforms has transformed the landscape of marketing communication, creating new opportunities for brands to engage with consumers through social media influencers. Influencer marketing has emerged as one of the most effective digital marketing strategies because influencers possess the ability to shape consumer perceptions, attitudes, and purchasing decisions through authentic and relatable content. This review critically examines consumer responses to social media influencers by analyzing the roles of trust, attitudes, and buying behaviour. The paper synthesizes findings from recent academic studies and industry reports to evaluate how influencer credibility, expertise, attractiveness, and authenticity affect consumer decision-making processes. The review also explores theoretical foundations such as Source Credibility Theory, Parasocial Interaction Theory, Social Learning Theory, and the Theory of Planned Behaviour to explain consumer engagement with influencers. Furthermore, the paper discusses the impact of different influencer categories, including mega-influencers, macro-influencers, micro-influencers, and nano-influencers, on consumer behaviour. The findings indicate that trust and perceived authenticity are among the strongest determinants of influencer effectiveness. Positive consumer attitudes toward influencers often translate into stronger purchase intentions and brand loyalty. However, concerns regarding transparency, fake followers, sponsored content disclosure, and ethical issues continue to challenge the sustainability of influencer marketing practices. The review concludes by identifying research gaps and proposing future directions for understanding evolving consumer responses in an increasingly digital marketplace.