Plinko online: a ball, a wall of pegs, and gravity
Plinko is what happens when someone turns a physics toy into a casino game. A ball is released at the top of a triangular board studded with pegs. It falls, it strikes a peg, it goes left or right, it strikes another peg, and it keeps doing that until it drops out of the bottom into one of a row of buckets. Each bucket carries a multiplier. Where the ball lands is where your bet lands.
There are no decisions during the drop. That is unusual for a casino game and it is a large part of the appeal - you set your parameters, you release, and then you watch. The whole round is a spectator sport that lasts about two seconds. Played online with virtual coins, as it is here, it becomes something closer to a fidget toy with numbers attached.
People arrive at plinko online from wildly different places. Some remember a version of it from television. Some saw a streamer drop a hundred balls in a minute. Some just like watching something bounce. All of them end up in the same place, which is staring at a wall of pegs and wondering, entirely reasonably, whether there is anything to think about here at all. The honest answer is that there is nothing to think about during the drop and quite a lot to think about before it.