Google Analytics is a free tool that can track website traffic, page views, and average pages per visit. It can track traffic down to specific cities and show how long visitors spend on pages and what percentage are new versus returning. Google Analytics has intuitive interfaces and features like site overlays, geo-targeting, email reports, visitor segmentation, and funnel and trend visualizations to analyze bounce rates, navigation, and conversion funnels. Using Google Analytics, businesses can improve pages and links, modify checkout processes, track referral sources, and gain more customers by understanding website usage and traffic.