The format you choose depends entirely on what you plan to do with the model.
If you are working on a professional project and need guaranteed quality, paid marketplaces are the way to go. The models here are usually created by veteran artists and are production-ready. how to download 3d model
On the model page, I found the button: Download , Download 3D Model , or a little arrow. Sometimes it asked for file format — STL for 3D printing, OBJ or FBX for animation/games, GLTF for web stuff. I chose OBJ. The browser started saving a .zip file. The format you choose depends entirely on what