Central management of feed subscriptions
The basic way that News Stream gets syndicated articles to end users is to define a set of system feeds and then use keywords or more sophisticated queries to select articles from those feeds for viewing (the other way, via direct feed subscriptions to individual end users, are covered later).
This section explains how to define the system feeds. It then explains how to set up queries for use with the News Query web part. Queries allow you to hone the selection of articles that are displayed much more precisely than keyword searches can.
However, it is not necessary to set up any queries to make use of the system feed collection, as other interfaces allow extracting and viewing articles from it based on keyword searches.