Lighthouse Audit: A Lighthouse Audit is an automated evaluation tool developed by Google that analyzes and rates a website's performance, accessibility, best practices, SEO, and progressive web apps (PWAs) features. It helps web developers and marketing professionals identify areas of improvement and provides recommendations to enhance the user experience, loading speed, and overall optimization of their website. The audit can be run using Google Chrome's DevTools or as a browser extension, and the results are presented in an easy-to-understand report with scores ranging from 0 to 100.