[1.20.1] Structure JSON question

So I'm making some modded custom structures for my world, but a bit seems to have changed since I last played with structures in 1.18.2.
Right now, I'm adding all JSONs of my structures in the structure folder, but I'm confused about the type. Last I remember, that determined how my structure spawns in the world, which usually I put minecraft:village. Now in 1.20.1, it seems very different. What am I supposed to put?
In addition, for structure set, are structure tags a thing, and can I use them, e.g. #minecraft:village?