Users of RSS new feed content use programs called RSS feed 'readers' or 'aggregators'. The user 'subscribes' to a feed by supplying to their reader a link to the feed. The reader can then check the user's subscribed feeds to see if any of those feeds have new content since the last time it checked, and if so, retrieve that content and present it to the user.
Articles are posted by various website contributors. Usually the contain information of concern to users, but can also contain helpful instructions on using the site. There can be multple article areas.