This document discusses the impact of social media on digital marketing and e-commerce. It explains that social media enables interaction without physical meetings and provides opportunities for customer engagement and information access. Social media influences user behavior by tracking browsing history, which is important for e-businesses to understand. Social media also allows businesses to gain wider reach through evolution of social commerce, which helps develop trust in the e-commerce sector. Product reviews on social media can strengthen e-commerce, while negative reviews are promptly addressed to build loyalty and retention.