Please note that our user log retention policy has been updated and you can get more information about the changes here.
In order to provide products and services, Yahoo!collects and stores information from user account registration and site usage. We generally refer to the information that we collect in connection with site usage as “user log data”.
Yahoo!’s policy is to de-identify search user log data within 18 months of collection, with limited exceptions to meet legal obligations.
In addition to the other purposes for which we collect information, other types of log data (ie not relating to search) (such as ad views, ad clicks, page views and page clicks) are retained for a longer period in order to power innovative product development, provide personalised and customised services, and better enable our security systems to detect and defend against fraudulent activity. Yahoo! takes additional steps so that data collected and used to customise interest based advertising (along with some content) on Yahoo! are not associated with personally identifiable information. We describe the data we store, and our processes in more detail here.
Servers Log Files