Lighthouse
In plain terms
A Google tool that audits web page quality.
Going deeper
Lighthouse scores pages on performance, accessibility, SEO, and best practices, offering actionable improvement tips. It's built into Chrome DevTools.
Under the hood
Automated audits surface Core Web Vitals and a11y issues; scores guide but don't fully capture real-user experience.
Examples
Performance audits, CI quality gates, SEO checks, accessibility scoring.
Think of it like...
Like a home inspector producing a checklist report on your site's health.