The level of detail at which the Facebook algorithm decides what you see in your feed increases to fascinate.

We always knew that the content we Like or linger on will impact what appears on our feed, but now it seems that when we use a reaction, that is potentially influencing the algorithm even more.

Advertisers will love this because it plays into the psychology of how we are feeling at any given moment in time when we're on Facebook.

By the same token, it also means that we can 'train' Facebook to show us more of the things that we are really interested in - be it sport, travel or indeed cat videos.  

In short, try to be more circumspect and choosy about what you Like or react to, and even lean toward only reacting to content which you genuinely want to see more of.