I Spent Six Months Chasing Core Web Vitals. Here’s What Actually Moved the Needle.

I Spent Six Months Chasing Core Web Vitals. Here's What Actually Moved the Needle. A field guide to LCP, INP, and CLS that skips the theory and gets to what breaks in production. Our dashboard said green. Our users said otherwise. For the better part of a year, we shipped features, ran Lighthouse locally, watched scores float between 92 and 98, and patted ourselves on the back. Then one Monday morning, support pinged us: a product manager testing on her own phone swore the listing page felt "stu