How to optimize a site for PageSpeed ​​Insights?

Question

Google

I periodically check sites through Google PageSpeed ​​Insights and get very low speed indicators: 50-70.
Along with these indicators, I receive a lot of recommendations to optimize, incl. what I can't optimize (all sorts of plugin files, etc. - what should I do? Wordpress includes them in a large number).
Many images can already be optimized with tinypng, but the guidelines still apply to these files.
I will add right away that many (even non-developers) rely on this data and urge them to optimize it.
PS Many people write that they do 100/100 sites - tell me how to achieve this, if this does not apply to SIMPLE STATIC layout, where I can get "green" anyway.
Thank you!

Answer 1

Are you using Photon/Jetpack?

Answer 2

100 out of 100 is difficult to achieve.
But you can follow the rules that are written here and you will most likely rise to the green.