A pingback is basically an automated comment that gets created when another blog links to you. A self-pingback is created when you link to an article within your own blog. Pingbacks are essentially nothing more than spam and simply waste resources.
Follow the steps below to disable self-pingbacks.
Click into the Perfmatters plugin settings.
Make sure you’re on the “General” submenu.
Scroll down and toggle on “Disable Self Pingbacks.”
Scroll down and click “Save Changes.”