Everyone can use the Google My Activity page to delete a big part or all of their search history. Delete or Clear your Google Search history and activity will only remove items entered into the Google products such as my activity
Google Maps timeline Location history, photos, YouTube Watch and Search Activity and etc. Nowadays everyone has multiple devices working through Android, Mac OS and other devices. Google allowed viewing and Removing/Deleting or Clearing your search history and other activity of the user through the Google My Activity Page for all linked devices of the Google Account.