If you are doing online marketing a lot, you will find out that content publishing has become one of the most important aspect in order to serve daily or weekly or monthly fresh contents for your readers.
Autoblogging might become handy to fill your website with rich contents from other blogger's site. This also can help you reduce the cost to hire a content writer or paid articles.
RSS Feed in natural will serves its reader with an excerpt or summary of the whole article. In order to read the full article, you will have to visit the actual website where the feed are being generated.
This Full Text RSS web app with fetch the feeds from the site feed url (e.g: website.com/feed/) and converts them into full articles including images, links,etc. This may become very helpful if you want to cross-sharing articles among your friends' blog.
If you're using Wordpress, there tons of plugins to automate this function. So whenever you or your friends published a post on each blogs, the Feeder plugin will connect to the Full-Text-RSS server/webapp and retrieve the full article and automatically post it both blogs.
Please ask me if you need more info.