1) Google Analytics provides free and premium web analytics services that collect and analyze data about website traffic. It dominates the market, powering 57% of the top 10,000 websites. 2) The tool calculates metrics like page views, visitors, visit duration, and bounce rate to give users insights into their website performance. It offers features like customizable reports, real-time updates, and intelligence notifications. 3) While the basic service is free, premium analytics with advanced features costs $150,000 annually. Google Analytics has helped many businesses set goals, track progress, focus on significant data, and make strategic decisions based on its reports.