A panorama is a single 360° view. A tour is an assembly of panoramas (photospheres) in a virtual visit. For example, a real estate agent will name the tour with the locations’s address, and each panorama will be the name of the room (kitchen, livingroom, bedroom, …). There is a minimum of one photosphere per room, but you can do more (large rooms), or less (rooms you don’t want to publish). The average count of panos per tour depends of what you want to show and how. An average tour for a real estate agent, contains 10 panoramas.