Followed Blogs Source
As you maybe know, Wordpress.com allows you to follow other people blogs from your account. You can see what the followed posts publishes and you're getting notifications for new posts.
Followed Blogs is the default source in the SmartRepost app which shows provides the posts from the blogs which you're following on Wordpress.com. It will provide posts based on your interest(because you're following the blogs which provides them).
The source Followed Blogs will provide you the posts text, link, title, published time and attached thumbnail.