Alerts are weekly e-mails that inform you when content that matches a saved search is added or changed. You can save searches for any set of content. For example, your search can be for a single document or for a set of documents at any level of the filtering hierarchy.
Note: Alert emails are sent out weekly for each saved
search with an associated alert. For example, if you set up alerts on three saved
searches, you might receive up to three emails in a week if each search has an
associated alert.