In selling with Square, you will need to house your products somewhere. This is where Square items come in at, it is the library of products that you will use throughout the Square suite of tools.
With your item library, every change you make to the products are reflected across the Square app, dashboard and online. This ensures that your store is always up to date, you are able to edit multiple items at a time using the Square import.
As of the time of this published blog, Square does not allow 360 or 3D photos but you can add gifs, photos, and short videos.