FAQ;n finns på http://www.google.com/help/faq_newsalerts.html
What are Google News Alerts?
Google News Alerts are emails automatically sent to you by Google when there's news about a topic of interest to you. You specify words likely to appear in articles about your topic and Google finds and delivers the news to you as it appears online.
So, what kinds of topics make for interesting News Alerts?
Anything that's interesting to you is a good subject for a News Alert. Many News Alerts are set up by people who are:
monitoring a developing news story
keeping current on a competitor or industry
tracking medical advances
getting the latest on a celebrity or sports team