What is this LinkedIn/Twitter influencer style of writing called?

The kind of writing that looks like this:

I went to the store today.

But it wasn't just any store.

You see, this was a grocery store.

With milk.

Eggs.

Cheese.

Even rice was piled high atop the shelves.

You get the point. Is there a name for this style of writing? When did it emerge? Why is it all over the internet now? I actually hate it so much and I want to know what to call it so I can rant about it with precision.