This is really easy!
In the Clover App Market, find Trezoro Loyalty + Rewards, click Connect, select the subscription plan and install it.
Open Trezoro from your Clover web dashboard and set up those rewards!
The Trezoro app will automatically download to your Clover device/s. Open the Trezoro app on your Clover device to let it sync and set your preferences, and then you're ready to start using Trezoro.