Subscriptions, feeds and alerts are ways that online users can get news right from the source instead of them going online to seek out news. The benefit is that users get to cut down on time they spend online. RSS feeds, Alerts, and other subscriptions enable the news you want to come to you directly in your mailbox when available.
All the user does is subscribe or click a link to join an emailing list and then all the news, articles and information that the user would normally seek out to come to them directly in their mailboxes. Basically, these tools change the way we view the internet further more. From you going online to look for information to you sitting back and having the information you want come to you!