You can subscribe to any of the following:
(RSS, Atom): with new blog posts.
Updates via email
: subscribe to
this mailing list
be notified when existing content changes. The idea is to complement the feeds where you get no such notifications (in contrast to Twitter).
(Twitter): tells you when new content is published or existing content is changed.
About feeds (RSS, Atom):
Feeds allows you to receive news in a fashion similar to email (unread messages etc.).
Wikipedia on feeds