Full page caching helps to speed up the loading speed of the site. When the website loads repeatedly, it increases the load on the server. Here, WordPress
Speed Optimization Services play an important role, which sets up the caching correctly. This gives a faster experience to the visitor and improves search engine ranking. In this process, the HTML output is stored, which makes the same page load faster the next time.
Check out more details at: https://webkul.com/blog/how-to-enable-wordpress-full-page-caching/