This study investigates how social commerce attributes shape customer engagement and repurchase intention among platform users in Coimbatore. Key dimensions examined include content informativeness, service quality, word-of-mouth, social interaction, and interactivity, with particular attention to the role of trust in fostering repeat buying behavior. A quantitative methodology was employed, utilizing a structured questionnaire administered to 385 respondents recruited through Instagram, WhatsApp, and Facebook. The data were analyzed using descriptive statistics, reliability analysis, independent samples t-test, ANOVA, and Pearson correlation. Results indicate that social commerce attributes significantly and positively affect both customer engagement and repurchase intention, while trust acts as a reinforcing mechanism for consumer confidence and loyalty. The study underscores the critical importance of interactive communication, content richness, and trust-building approaches in cultivating enduring customer relationships within social commerce environments. This research is aligned with the United Nations Sustainable Development Goals (SDGs), particularly SDG 8 (Decent Work and Economic Growth) and SDG 9 (Industry, Innovation and Infrastructure), and it highlights the role of digital commerce platforms in promoting sustainable business growth, innovation, and technology-driven customer engagement.