These custom feeds are most useful if you want to be alerted
whenever a specific page has been updated. For example, if you wanted
to follow Google.org's latest products, just type
subscription" field. Click "create a feed", and Reader will
periodically visit the page and publish any significant changes it
finds as items in a custom feed created just for that page.
We provide short snippets of page changes to help you quickly decide
if the page is worth revisiting and we're working on improving the
quality of these snippets. If you don't want Google to crawl or create
feeds for a specific site, site owners can opt-out.
If you have a feed-less page you've been dying to follow, sign in to
Google Reader and try it out for yourself. more info at http://googlereader.blogspot.