Actually, I mean in search engine as well as on-pageNot enough details to suggest you anything. Optimized as in? SERP? On page? Server?
If you're referring to speed optimization alone, swapping the theme and removing excess code will help.Actually, I mean in search engine as well as on-page
I will review the article, thankscheck-in the below link mate, you will get the required information.
https://www.w3trainingschool.com/optimize-site-millions-pages