Google Alerts is content change detection and notification service, offered by the search engine company Google, that automatically notifies users when new content from news, web, blogs, video and/or discussion groups matches a set of search terms selected by the user and stored by the Google Alerts service. Notifications can be sent by email, as a web feed or displayed on the users iGoogle page.
Google Alerts are e-mail of the latest relevant Google results (web, news, etc.) depending on your choice of query or topic.