In the age of authenticity, this study project examines how influencer marketing is changing and focuses on methods for building enduring relationships with customers on social media. Influencer marketing is becoming more and more popular as a reliable way for businesses to engage with their target audience in a time when authenticity is crucial. This study attempts to provide important insights for firms trying to negotiate the intricacies of the digital marketplace by analysing how well different influencer marketing tactics develop consistent consumer engagement. The research will look into how influencer authenticity, reach, and niche alignment affect audience resonance and brand affinity using a mix of qualitative and quantitative analysis, case studies, and consumer surveys. Ultimately, the findings of this research will provide actionable recommendations for businesses looking to leverage influencer marketing as a strategic tool to foster long-term customer loyalty and drive success in the dynamic world of social media marketing.