The Netlify Lighthouse plugin is a tool that automatically generates a Lighthouse report for every deploy, allowing users to regularly monitor the metrics that matter to their team, such as SEO, site speed, and accessibility. This plugin is part of Netlify's series highlighting Build Plugins, which aims to provide users with an easy way to power up their builds. By integrating Lighthouse into CI systems, users can ensure their performance doesn't degrade over time, and easily roll back to a previous, more performant version of their site if needed. The plugin is available for one-click installation in Netlify's UI, making it simple to get started with monitoring and improving the quality of web pages.