Site speed

Minimise http requests

Reduce the time to first bite (ttfb)

Run compression audits and compress files

Use GZip

Reduce image sizesĀ

Ministry and combine website filesĀ 

WP Rocket plugin

Use asynchronous loading

In WP rocket tick load css files asynchronously and load JS files deferred

Browser caching is enabled

W3 total cache

Install a CDN if needed