Master Next.js 15 data fetching — fetch cache semantics, unstable_cache, on-demand revalidation, and Suspense streaming for faster perceived performance.

Understand LCP, INP, and CLS — Google's Core Web Vitals — and fix the real code causes that tank your scores and hurt your search rankings.

React Server Components run on the server, cut JS bundle size, and enable direct DB access — but they're not right for every component. Here's the complete picture.

Missing dependencies, infinite loops, stale closures — the 7 most common useEffect pitfalls explained with before-and-after fixes.

Use the Next.js App Router metadata API, JSON-LD structured data, and SSR to ship crawlable pages that rank — from generateMetadata to sitemaps.