I don’t think it’s a zoomer thing, it’s basically the evolution of shitposts. It’s low effort (or trying to appear that way) and trying to communicate something (often a vague feeling or a joke, and the joke is often playing off another meme)

There’s no reward for getting people to read your posts here, no algorithm to game. It’s more like memes for the sake of communication than entertainment, it’s more of a small community thing than anything else… It’s been around since image sharing became a thing

There’s more mainstream memes on here too, but they’re basically different genres of meme