Build the feed, Generate the code, and Style the results.
An RSS Feed is a dynamically generated summary of information published on other web sites- so when the published RSS changes, your web site will be automatically changed too. Think of it as a box you define on your web page that is able to update itself, whenever the source of the information changes, your web page does too, without you having to do a single thing to it. .
It is a rather simple technology that allows you, the humble web page designer, to have this content displayed in your own web page, without having to know even how it works.
This service is based on the original site that was developed at the Maricopa Community Colleges back in 2003. RSS was just starting to get popular in 2003, and it seemed like people could use an easier method for incorporating it into their own web sites. If you host your own web site and can download, configure, and install a few PHP files, then you are welcome/encouraged to set up your own instance of Feed2JS.