Social media influencer marketing has emerged as a key strategy for promoting Fast-Moving Consumer Goods(FMCG)inIndia. Influencers can sway consumer perceptions, build trust, and increase purchase intention. This study investigates theimpactofsocial media influencer marketing on FMCG product purchase intentions among women consumers. A sample of 100respondentswascollected from Chidambaram town using structured questionnaires. Regression analysis was used to identify the impact of influencercredibility, content quality, and engagement on purchase intention, while Structural Equation Modeling (SEM) examinedtherelationshipbetween the factors influencing consumer behaviour. Findings indicate that influencer credibility and engagement significantlyaffectpurchase intention, whereas content quality has a moderate impact. The study provides insights for FMCGmarketers tooptimizeinfluencer campaigns for better consumer conversion. Keywords: Social Media, Influencer Marketing, FMCG, Purchase Intention, Regression, SEM