Using Alerts
The Alert feature of a Team Site sends
e-mail notifications to interested team members whenever another member changes
some aspect of the Team Site. Each member decides which lists, libraries, or
documents they want to receive alerts about.

Clicking any Alert Me link on a Team Site
page (as shown above) displays the New Alert page shown below. On this page, you
can ask to receive change notices for the current document or for any document
in a specified folder (subject to filters), set notification criteria, specify
your e-mail address, and indicate how long Windows SharePoint Services should
accumulate changes before sending them.

The figure below shows a typical alert message. Although the
message in the figure provides only one notification, a single message can
report multiple changes.

The notification process periodically scans a database and
combines all notifications to the same recipient. The less often you choose to
receive messages, the more notifications each message will
contain.