You have to know what RSS is before you can utilize it.  RSS is commonly called Really Simple Syndication although its more technical name is Rich Site Summary.  It basically stands for publishing updates to web-based content on a regular basis.  The whole idea behind RSS is that data can be shared and distributed.  Web page content or news articles are often part of RSS. 

In many ways RSS is similar to email.  It collects and delivers the shared data.  If you have chosen to receive RSS, you will receive this data.  News publishers will often collect syndicated content and then they will publish it.   When thinking of a blog, you can use RSS in the same fashion. 

A web publisher, or a blogger, can utilize RSS to provide updates to those interested.  They can utilize news headlines or other postings in this process.  RSS can also be used to send out new content to the blog’s readers.  It is a great way to let people know when you have something new out there.