Welcome to WordPress 5.5.
In WordPress 5.5, your site gets new power in three major areas:
speed, search, and security. Speed
Posts and pages feel faster, thanks to lazy-loaded images.
Images give your story a lot of impact, but they can sometimes make your site seem slow.
In WordPress 5.5, images wait to load until they’re just about to scroll into view. The technical term is ‘lazy loading.’