Jetpack Boost provides one-click optimizations that supercharge your WordPress site’s performance and improve web vitals scores for better SEO.

Currently, the plugin has 3 performance modules available:

1. Optimize CSS Loading generates Critical CSS for your homepage, posts and pages. This can allow your content to show up on the screen much faster, particularly for viewers using mobile devices
2. Defer Non-Essential Javascript moves some tasks to after the page loads, so that important visual information can be seen sooner.
3. Lazy Image Loading only loads the images the user can see. As the user scrolls, images are loaded just before they show up on the page. This simple optimization makes sites faster and saves bandwidth for your host and your customers.