How to Have a Conversation on the IndieWeb by Desmond Rivet:
Consider the concept of a "like", for example. On a site like Twitter, a like is an action you perform against another person's content; you click the heart icon next to someone's tweet, and the like counter for that tweet goes up. It's an implicit connection between two people - the one who did the liking and the one who received it.
An IndieWeb "like", on the other hand, is not an action you perform on someone's content, but rather a standalone post that you own and publish to your site. It's a reversal of the way people usually think about the transaction, and it reflects the premium IndieWeb members place on controlling their own content.
Notably, in the simplest version of this scheme, the person who's post was liked - the likee, I guess? - might not even be aware that anything has happened at all. I mean, how would they? The entire interaction was wholly contained on another site.