This is the 2021 Ultimate Guide to Increase WordPress Site Speed :

1. Test Website Speed
2. Choose a Good and Reliable Web Host
3. Always Keep Your Plugins, Themes, and WordPress Software Updated
4. Only Use High-Quality Themes and Plugins
5. Check Plugins & Make Sure They Work
6. Delete Unused Themes and Plugins
7. Optimize Website’s Images
8. Choose the Right Image Resolution & Format
9. Add LazyLoad to Your Images & Videos
10. Pay Attention to How Fast Google Ads Load
11. Reduce the Number of Redirects
12. Use a High Quality DNS Provider
13. Make Sure to Use Content Delivery Networks
14. Minify and Compress Your Website’s Files
15. Enable Caching
16. Enable gZIP Compression
17. Delete or Control Post Revisions
18. Cleanup WordPress database
19. Disable Hotlinking
20. Reduce Spam – Install Akismet Plugin
21. Disable Pingbacks and Trackbacks
22. Improving Website Speed on Mobile View

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