Millions bloggers do the same SEO mistake providing full content in their RSS feeds. This mistake affects website traffic and search engine position:

     Social networks like Zimbio or Feeds2Read (and more) find new posts through feeds and show full content on their pages. This situation makes search engines think that you copied content from social network if search engines discover this social network page with your article faster than original source. Providing summary you show only first sentences with “read more” button which lead directly to your site. It gives you full credit as an author.

     Visitor who read your article on social site will can get entire content and bypass option to visit your site. When blogger / news publisher show only summary on his feed it generate article summary on social sites and people click “read more” button to finish reading directly from your site / blog.

     Moreover, there are bunch AdSense made websites (especially from Asia) which copy full content from sites through RSS feeds without providing link back.

     To avid duplicate content, content thief and more visitors it is important to switch RSS feeds from full content option to summary preview.