Query Logs Used for both tuning and evaluating search engInes also for various techniques such as query suggestion ypical contents User identifier or user session identifier Query terms- stored exactly as user entered List of urls of results their ranks on the result list and whether they were clicked on Timestamp(s)-records the time of user events such as query submission, clicks 13/NQuery Logs • Used for both tuning and evaluating search engines – also for various techniques such as query suggestion • Typical contents – User identifier or user session identifier – Query terms - stored exactly as user entered – List of URLs of results, their ranks on the result list, and whether they were clicked on – Timestamp(s) - records the time of user events such as query submission, clicks 13/N