Tab Promo is a rule-based promotion engine for the Shopify checkout. Merchants build campaigns from conditional rules across customer, cart, product, and country signals, then publish them as Shopify Functions discounts or codes. Tab Promo also reads customer, product, and variant metafields as discount conditions, so promotions can use data already written by loyalty, review, or segmentation tools. Each publish is versioned, reversible, and can be simulated before going live.

• Run multiple discount campaigns at once, each with its own rules and schedule
• Turn loyalty, review, and CRM metafields into checkout discount conditions
• Show campaign progress and discount eligibility on storefront pages via API
• Test each campaign on a sample cart before publishing to live checkout
• Roll back a published campaign to its previous version in one step