After you've subscribed and connected your bank account to your Shuffle profile, it's pretty simple:
1. Eat or drink out at one of your Shuffle Spots. These are your personal venues for the month, randomised just for you. You'll find your current list in the app, and it refreshes at the start of each month.
2. Pay your bill using your connected card. No need to do anything else, just pay as normal.
3. Your reward is automatically added to your Shuffle account. Rewards are randomised, from 5% up to 100% of your bill, and may take up to 2 days to appear.