The file admin-ajax.php plays a key role in WordPress websites, it is the core file that manages AJAX requests and allows you to implement dynamic features such as real-time notifications, asynchronous form submissions, infinite scrolling, etc. without having to refresh the entire page. When admin-ajax.php is overused, it can be the culprit behind a site's performance degradation. This article will take an in-depth look at what admin-ajax.php can do, how its overuse affects performance, and how it can be used to improve your website's performance...