Forum Moderators: Robert Charlton & goodroi
IP and cookie information is important for helping us apply this method only to searches that are from legitimate users as opposed to those that were generated by bots and other false searches. For example, if a bot sends the same queries to Google over and over again, those queries should really be discarded before we measure how much spam our users see...If we do our job well, you may see low-quality results from time to time, but you won't have to face sneaky JavaScript redirects, unwanted [adult content], gibberish-stuffed pages or other types of webspam.
[edited by: tedster at 5:29 pm (utc) on June 29, 2008]