For questions pertaining to communication bandwidth, whether cellular data or WiFi.
Bandwidth is a term used to describe "how much network traffic" is being used by an app or device. Some measure it as "how much network speed" is used or needed, some measure it as "how much total data" is used or needed. The first will have the speed of your network connection affect your user experience, while the second will have your total data transferred affect the cost of your connection.