In-cart discounts have certain usage limitations to keep in mind when creating a campaign.
1. Discounts won’t appear on product pages
Since in-cart discounts are designed to let you target specific customer groups or create advanced discount conditions (like, only applying the discount to orders of minimal value and more), they cannot be displayed to your whole website audience storewide - on product pages or in announcement bars.
2. Automatic campaigns are limited in number
Shopify limits the number of active automatic discounts created through Shopify apps to 5 per store at any given time. If you reach this limit, new automatic discount campaigns will not activate until you deactivate some of your older campaigns.
Automatic discounts from all Shopify apps — product, order, bulk discounts, etc. — count toward this limit.
3. Discount code targets are limited in number
A single discount code can be applied to up to 100 specific customers, products, variants, etc.