I am just wondering what this app is (do not have an Instagram account so can’t try it; I had deleted mine, so not creating one). How the fuck everyone is talki

I am just wondering what this app is (do not have an Instagram account so can’t try it; I had deleted mine, so not creating one). How the fuck everyone is talking about an app on HN that’s is Facebook one of the richest tech companies with one of the biggest tech pool out there which is just essentially a copy of Twitter. It’s like kids got a new toy. Any toy. So they gotta play with it.