1. A method for analyzing user behavior data gathered from the user's session using a search mechanism, the method comprising: an act selected from the group consisting of: tracking when content desired by a user exists, but is not returned in a search result list when a query is made by the user with intent to find the desired content; tracking when content desired by the user does not exist in which the user searched for said content by a query made by the user with intent to find the desired content; tracking when content desired by a user exists, but is not recognized by the user in a result list; and tracking when content desired by a user exists, but is so low in a result list that it falls below a set threshold.