Your staff can't memorize every customer. Flag one — VIP, wholesale buyer, birthday, lapsed shopper, expiring member — and the moment they are added to a sale, a color-coded notice tells whoever is at the register exactly what to say. No profile lookup. No sticky notes on the counter. Rules run on customer tags, purchase history, name, email, or customer metafields, including dates that repeat every year. Three surfaces: pop-up toast, home-screen tile, customer profile. No code, no backend.

• Alert when a flagged or blocked customer starts a transaction
• VIP badge so staff recognize your best customers at the register
• Birthday and anniversary rules fire every year on the date, automatically
• Set your own rules by tag, purchase history, name/email, or customer metafields
• Ask Shopify Sidekick for help to set up your rules and check their activity