>If you type anything into Google's search box, your search will be recorded and preserved forever so that Google's engineers can analyze usage patterns. How else would they improve their search algorithm?
Or only retain the data for a set period of time. You can refine indexes with 6-12 months of data. You'd only want to keep unaggregated data for more than that if you were building profiles of individual people.
Or only retain the data for a set period of time. You can refine indexes with 6-12 months of data. You'd only want to keep unaggregated data for more than that if you were building profiles of individual people.