Web Performance Basics: Core Web Vitals
A practical introduction to Core Web Vitals — LCP, INP, and CLS — explaining what each metric measures, why it matters for SEO, and how to improve it.
Caching: The Fastest Code Is Code You Do Not Run
A foundational guide to caching: where caches live, how HTTP caching works with Cache-Control and ETags, invalidation strategies, and common pitfalls.