Forum Moderators: Robert Charlton & goodroi
Log into your Google account, and go to their help pages, there should be some additional information somewhere by the "personalized search" or "search history" functions.
But since it only shows if you're logged in with your Google account, I have a hard time trying to imagine what it could be used for.
Apart of what it is.
you can delete your history by going to your Google Account page, then hit “Edit” next to services, then click “Delete Personalized Search”.
Google describes this feature as “an improvement to Google search that orders your search results based on what you’ve searched for in the past,” going on to say that you “may not notice much difference at first, but as you build up your search history, your personalized search results will continue to improve.”