What is inside the download
One .zip per map: the world folder, plus whatever extras that particular build needs.
One archive per map
Every map is delivered as a single .zip file. If a build ships in more than one form — a world folder plus a schematic, say — both sit inside that one archive, and the map's own page says so.
- The world folder — the thing you copy into saves.
- Schematic or structure files, when the build is meant to be pasted into a world you already have.
- A short read-me, when the build needs anything beyond copying: a required game version, a resource pack, or where the spawn point is.
The formats a given map ships in are listed on its page, in the specs column beside the description. Worth checking before buying if you need a particular one.