Fediverse

Ideally you've been lurking a while and have an idea of what the comms are called. Or, you come from Reddit and you know most of them are the same (e.g. Ask Reddit → Ask Lemmy).

Then you have a choice between a comm on an instance that is friendly toward yours (i.e. is not likely to defederate you/yours in the future) or one that is more popular. I generally like to post on dbzer0, quokk, hexbear, sh.itjustworks, and similar when I can. But Lemmy.world, Lemmy.ml, Lemmy.zip, and a few others get more traffic, so I might post to one of those if I want to get replies. But even if you're on a smaller instance and you post to bigger instances to get traffic, I think you should post on your own instance, at least cross post it, or contribute to your own instance in other ways.

So, in short: your instance to support it, the bigger instance to get visibility. For something like Meditation, maybe a broad comm like AskLemmy, and a more focused one like Buddhism (or whatever).