Every blogger read and link to it's blog a many other sources,
which are usually RSS feeds or other Web content. As RSS feeds
(doesn't matter in which format RSS/RDF) are common practice to
offer XML data from blogs, this is preferable source for most of
the bloggers. The utilities for collecting such data are known as
The blogging support implements a own channel/blog aggregator,
so bloggers may import RSS as specifying a URL to it, or using a
directory formats as OCS and OPML. Secondly the channel feeds
requested by blogger will be refreshed on a periodic basis
(depending of channel parameters) and will feed the data locally.
Once the channel is refreshed a blogger may do "BlogThis!" when
browsing the local copy of the channel. This function is available
via Admin UI - Weblog UI, or via "Channels" on blog home page when
owner is authenticated.