> For the complete documentation index, see [llms.txt](https://support.novel.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.novel.com/start-guide/tiers.md). # Tiers Add tiers to your brand's wallet pass.

## **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. *** ### Tier Rewards When a customer installs their pass, their tier is calculated and assigned. The [**welcome bonus** ](/start-guide/configure-rewards.md#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**](/start-guide/configure-rewards.md#tier-upgrade-bonus).