This is a listicle post that contains all sorts of useful links on WordPress and Shopify speed optimization.
Useful Links for Page Speed Optimization
Google PageSpeed Insights: The Truth About Scoring 100/100
How to Speed Up Your WordPress Website in 2020 (Simple Guide)
How to speed up a website in 2020: a technical checklist for tackling page speed optimization
How to Improve Page Speed from Start to Finish (Advanced Guide)
Page Speed Optimization: Metrics, Tools, and How to Improve — Best of Whiteboard Friday
Image SEO: Ranking higher using images