Social media metrics and analytics can provide insights into online behavior through tracking, analyzing, and presenting digital data. Key measures include reach (how many times content is seen), engagement (sharing, likes, comments), emotional response, and behavioral outcomes like purchases. Tools like Google Analytics track web traffic sources and user behavior to help optimize websites and content. Social media platforms also provide analytics on engagement through tools like Facebook Insights and Twitter analytics. Network analysis and visualization can further explore online interactions and communities through the lens of social network theory and cognitive dissonance theory.