This feature checks the last updated status of plugins and themes and alerts you if not updated in a specific amount of time. This gives you insight on if a plugin or theme may have been abandoned by the author:
On the MainWP > Settings page, in the Upgrade Options box, you will be able to find Abandoned Plugins/Themes Tolerance option:
Here you can set specific amount of time for this feature. By default, it is set to 365 which means that if there wasn’t an official release from author for last 365 days, your dashboard will mark the plugin/theme as possibly abandoned.