Lighthouse is an open-source tool developed by Google designed to test and improve the performance and usability of web-based applications, which has become a priority for many companies due to its impact on user experience. By simulating conditions such as a slow 3G connection and CPU throttling, Lighthouse performs audits on metrics including performance, search engine optimization (SEO), best practices, accessibility, and progressive web apps, generating detailed reports that allow developers to identify areas for improvement. It offers various methods for running audits, such as through the web, command line, Chrome DevTools, or browser extensions. Although it provides valuable guidance in optimizing web performance, Lighthouse is not a comprehensive solution and should be used alongside manual testing and other tools, especially given its limitations and the potential impact of browser extensions on results. Regular updates to Lighthouse are crucial for maintaining accurate assessments, as changes in scoring and audit criteria can affect outcomes. The integration of Lighthouse into continuous integration (CI) workflows helps maintain consistent performance scores across development cycles, contributing to a more accessible and efficient web experience.