Have a question, but don't know where to start? Check out the Google Sites FAQ!
Feedity as the feed generator. It is a free service, and it takes just moments to configure. For the purpose of this article, I will list instructions based on the Feedity service.
On the Preview page, you will also have the option to refine the settings for your feed. You have three options:
On this last page, you will see your feed URL in a rectangular box near the middle of the screen. You can either copy the URL to your clipboard, or click the link above the URL to browse to the new feed. (The link above your URL will be the title of your Google Site.)
Using http://siteshelp.kccloudsolutions.com/ to create a new feed using the Feedity service provides the following result:
In all honesty, it's the exact same as creating a link to another page, an image, or a file on your site. Simply add the text/image you wish to link to your feed, select it, create the link via the "Link" option in the Edit toolbar, and save. That's it! (You'll use the URL generated above when creating the link.)
make any site RSS" turns up a good list of alternatives, and would be a great place to start. However, if you don't want to do the search yourself, you might check out a few of these: