The service is Google News Alerts:
A third party service worth trying out is called Google Alert:
PC World say:
"Google's great, but Google Alert makes it better, by performing
automated searches on a regular basis and e-mailing you the results.
You can do a simple search, or hone it by including or excluding
words, sifting through updated pages only, searching a particular Web
site, picking a specific format (say, PDF), and more. Google Alert
includes a useful miniature browser for viewing results--just click on
the link at the top of the e-mail message the service sends you."
Search strategy: personal bookmarks, I currently use both services