Here are some of the plugins that we recommend when you're using WordPress, and a small description of each plugin why we do recommend them.
LiteSpeed Cache - It's a caching plugin that utilizes a caching system directly within the web server itself. By caching at the web server level, you'll not only increase performance because you'll skip a few steps in the process, but you're also able to utilize better functionalities such as ESI and intelligent compression.
Filename-based asset cache busting - If you're utilizing a CDN, such as our own, and you don't want to deal with purging files whenever they change, the Filename-based asset cache busting may be the solution, it works simply by adding a timestamp (when it was last modified) in the filename when linking to the file, thus invalidating the cache automatically.
Disable Cart Fragments by Optimocha - If you're using WooCommerce, you're often performing "Cart Fragments" on the page - this is ajax calls that are performed on the site to update the cart data. While this is perfectly fine, sadly WooCommerce runs these ajax calls even if you have nothing in your cart - it consumes plenty of resources for no reason.
WP Mail SMTP by WPForms - By default WordPress doesn't send emails via SMTP, WP Mail SMTP solves this problem and increases the email deliverability.