Y Slow testing

All of this (except cookie free) can be done with good caching plugins like WP Super Cache or W3 Total cache.

Expires can be done in your .htaccess — https://www.tipsandtricks-hq.com/how-to-add-far-future-expires-headers-to-your-wordpress-site-1533

Cookie free … I wouldn’t even bother trying.

How to put js at bottom using W3TC, I’ve tried with “JS File management” option by adding js files. I’ve set the location before </body> but it’s not working. Can you please tell me why? and ya “Minify” is enabled.

Can you confirm you are using multisite as well?

@andrea_r
Ya, I’m using multisite, And have activated W3TC for that particular site.