Google Analytics is a tool that collects and analyzes website usage statistics. It provides more interactive and customizable reports than traditional log file analyzers, which required technical expertise. Google Analytics inserts JavaScript on webpages that sends usage data to Google servers. This data includes URLs visited, time spent, device details, and more. Administrators can then view reports on metrics like pageviews, visits, and visitor demographics. The tool helps answer questions about how users engage with a site but cannot track certain offline interactions.