Browse the guides
How to Make a WordPress Site Faster
Read guide →Does Your WordPress Theme Affect Site Speed?
Read guide →Do Lightweight WordPress Themes Really Make a Difference?
Read guide →Core Web Vitals for WordPress
Read guide →WordPress Fonts & Performance
Read guide →WordPress Image Performance Guide
Read guide →How to use this section
Start with the page closest to your actual decision, then move into setup or adjacent guides only when they answer a real follow-up question.