Use the following plugins to speed up and optimize your site .
Each setting is individual and depends on your server and content .
- Autoptimize HTML ,CSS , JavaScript and use images lazy load
 - Async JavaScript
 - Shortpixel – Optimization images
 - Autoptimize + ShortPixel AI + CDN work
 - Super Cashe
 - Add Expires Headers
 - Asset CleanUp: Page Speed Booster
 - Enable NGINX caching if possible
 - Configure the server to display correctly WEBP images (you can use Shortpixel for generate this type of images)
 - Disabled all unnecessary plug-ins