there are comments under the post, people have left their posts, their are considered deadposts because nobody will probably read them any time soon, the idea is to remedy that,
read other posts and upvote the comments, discuss the topics you like, that's it.
It's a weekly curation challenge or however you want to frame it, every week people add comments with posts, the cycle repeats, people get some exposure on their posts and effort, there is a conversation sparked here, that's the idea.