Okay developers — in this video I show you a Chrome tool that can basically “rate” your website, and it’s way more useful than it sounds. It’s called Lighthouse, and you can run it straight from Chrome DevTools (same area where your Console lives). The whole point is simple: generate a report, get judged on the stuff that actually matters, and then use the feedback to make your site better. I walk through Lighthouse using GitHub as an example and run the report in mobile mode. You’ll see scores for Performance, Accessibility, Best Practices, SEO, and Progressive Web App checks. GitHub’s performance score comes back at 66 (which is… pretty poor), and Lighthouse tells us exactly why: things like total blocking time, time to interactive, render-blocking resources, unused JavaScript/CSS, and image optimizations. Then I jump into Accessibility (like headings not being in a sequentially descending order), Best Practices (errors being logged to the console), and SEO (for example, links not being crawlable). The takeaway is: run Lighthouse, fix one thing at a time, retest, and watch that score go up — it’s genuinely satisfying.