Here is an example of a news feed from the New York Times Dealbook embedded in this site. The feed url will constantly update the headlines here.
This guide explains how you can stay current using "push technology" -- that is, by setting up feeds or alerts so that information comes to you, rather than you having to repeat searches for topics of interest.
Why should you use them?
RSS feeds and email alerts can help you find out about new literature in your field, such as:
Google offers a wide variety of free web-based tools and services. You don't need to have a Gmail account to use them -- you can create an account using any active email address.