In this post, Jean from Cats Who Code has compiled 8 must-have WordPress plugins for every WordPress site which could reduce server loading time and make the site more user-friendly. The list of plugins cover areas such as caching, lazy loading, combatting spams and image optimisations.
Update: Also do check out this similar post we have written about our eight favorite free WordPress plugins. These are generic plugins that can be used on pretty much any kinds of WP websites. Enjoy!