WP Speed 404 can either suppress or log any 404 errors affecting your site under wp-content, wp-admin and wp-includes
(configurable). 404 errors are generally very 'expensive' on WP sites as they cause WP to run on every attempt, slowing
down your site and causing additional load on your web hosting environment.
Compress images, convert them to WebP, find unused images, and even optimise pictures uploaded through form plugins like Gravity Forms — all locally, with no third-party servers.
Prevents WordPress from delivering full Page-Not-Found errors when the browser is not expecting a full HTML page. Saves bandwidth and improves performance.