The Web Vitals Extension is a browser tool designed to help developers and website owners measure the performance of their web pages. It focuses on key metrics that impact user experience, such as loading speed, interactivity, and visual stability. By providing real-time feedback, the extension allows users to identify areas for improvement. This extension is based on the Web Vitals initiative by Google, which emphasizes the importance of user-centric performance metrics. By using the Web Vitals Extension, developers can ensure their websites meet the standards necessary for optimal user engagement and satisfaction.