Heartbeat is used to refresh the background automated tools in WordPress. If you have a plugin that shows data in real-time. To display messages in the wp-admin. To show you if an author is already editing an article.
Frontend Heartbeat Control: By enabling this option, you send a heartbeat to the front page of the WordPress site itself.
Frontend Heartbeat TTL: the time at which the heartbeat will be executed.
Backend Heartbeat Control: By enabling this option, you send a heartbeat to the backend of the WordPress site itself.
Backend Heartbeat TTL: the execution time interval of the backend heartbeat.
Editor Heartbeat: This option allows you to control the heartbeat in the WordPress editor.
Editor Heartbeat TTL: The heartbeat operation time. If you set it to zero, you will disable the frontend heartbeat.
