This is an optional section is 

This is your blog, it is an optional section if you prefer to manage your store separately from your blog and other content. If not, it's a great tool that you can use to write about new product launches, experiences, tips or other news you want your customers to read about.

We automatically create an RSS Atom Feed for all your blog posts. 

This allows your customers to subscribe to new articles using one of many feed readers (e.g. Google Reader, News Gator, Bloglines).