# Tiers

## **Overview** Novel's wallet passes are dynamic and can change over time. Creating tiers allows you to gamify your customer experience. You can set tier requirements in Novel by navigating to **Wallet Pass** and clicking **Add Tier.**

### Referrals Based on the number of successful referrals a customer has made. A successful referral is when a customer's friend adds a pass via their QR code or referral link on back of pass. ### Customer tags Novel syncs all Shopify customer tags in real time. This means you can set tiers based on your subscription programs, loyalty programs, etc. ### Email list You can upload a CSV list of customer emails for a specific tier. ### Lifetime customers spend. Novel syncs your customer's lifetime spend from Shopify. Simply set the threshold that a customer needs to hit to enter that tier. *** ### Tier Rewards When a customer installs their pass, their tier is calculated and assigned. The [**welcome bonus** ](https://support.novel.com/configure-rewards#welcome-bonus)associated with that tier is given to the customer. If an existing pass holder elevates to another tier, you can set a [**tier upgrade bonus**](https://support.novel.com/configure-rewards#tier-upgrade-bonus).