Not sure about the most common, but I used it to inspect some requests that an app was making so I could find the needed parameters to get the data from the App

Not sure about the most common, but I used it to inspect some requests that an app was making so I could find the needed parameters to get the data from the App’s backend servers in a tool I was developing. I was able to proxy the app’s connection and inspect the traffic as I used the app and was easily able to see what it was doing and replicated the parts I needed.