What it actually is that it remembers user preferences based on search history, usage pattern, calendar appointments and so on and presents information and messages based on those data. (goodereader.com)
These function as targeted online advertisements, using web search history of people to find potential customers. (loveohioliving.com)
My internet search history has indicated to me that I may have slight obsession with outdoor kitchens at the moment. (unassaggio.com)