Go to your challenge website address or open up the Big Team Challenge iOS/Android app and enter the address when asked.
Your challenge website address should look something like:
Syncing your steps is the simplest way to add your daily activity to the challenge. You can sync your steps from Fitbit, Garmin Connect, Apple Health on iOS and Google Fit on Android.
Alternatively, you can manually add your activity via the challenge website and our challenge app.