[nine_k]

The idea is that your newsfeed eventually becomes uniquely tailored to you.

Of course it contains posts that may be shared widely and thus unifying, or posts from your close friends and relatives and thus also unifying in a way. This is not a given though, and the context of your newsfeed is effectively unique.

This is one of the reasons community feeds exist, which are the same for the members of a community and thus somehow unifying, around a topic of interest.