How do I set up Shopify Flow to alert me when bestsellers are running low?

A bestselling style that runs out of stock mid-summer is revenue you simply cannot recover. Shopify Flow now connects directly to your sales data, which means you can set up automatic low-stock alerts without paying for a third-party app.

Navigate to Shopify Admin, then Apps, then Flow, and create a new automation. Set the trigger to fire when inventory quantity for any of your top-ten styles drops below a threshold you choose — often based on your average weekly sales velocity for that item. The action should send you an email so you have enough time to reorder from a fast-lead-time vendor before selling out completely.

While you're in Flow, set up a second automation that tags any style as needs-review when it has been active for 30 days and has sold fewer than three units. Catching slow movers at 30 days instead of 90 gives you time to try new styling, change its display position, or run a promotion before the item becomes a clearance problem.