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Send a campaign to a customer when a product they recently viewed becomes available again. This flow brings shoppers back to items they showed real intent on, right at the moment those items are buyable.

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Before you start

Before you build the flow itself, prepare the campaign you want to send when the trigger fires.
1

Create an automated campaign

Create an automated campaign in the channel you plan to use: email, SMS, Viber, mobile push, or web push.
2

Insert the viewed product

Use the ProductView parameter to render the viewed product inside the campaign, or build the content in the new editor, which lets you pull in the product without configuring parameters manually.
You can also add a block of related items or personalized recommendations so the customer has something to fall back on if the original product is no longer the best fit.

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How the trigger works

The flow launches on the Viewed Product Changed — Product Returned to Availability event.
  • The trigger fires every time a product transitions from out of stock back to in stock. If a product cycles in and out of availability, each return to stock can trigger the flow again.
  • The trigger fires per product. If several products that a customer viewed come back in stock at the same time, the flow runs separately for each one.
Because of this behavior, you should add frequency caps and delays so a single customer does not receive a burst of messages at once.

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Build the flow

1

Add the trigger

Set the flow to start on the Viewed Product Changed — Product Returned to Availability event. Apply a per-customer frequency cap so the customer cannot enter the flow multiple times in parallel.
2

Restrict send times

Add a condition that prevents the campaign from going out at night. If you run other product-availability campaigns in parallel, add a delay so this flow does not collide with them.
3

Validate the product view and stock

Add filters that confirm:
  • The product view happened recently (so you don’t message customers about something they looked at months ago).
  • The product is currently in stock at the moment the campaign is about to send.
4

Check subscription and contact data

Confirm the customer still has an active subscription for the channel you’re using and that you have valid contact information (email address, phone number, push token, etc.) for that channel.
5

Send the campaign

Send the prepared campaign. Optionally include related products or personalized recommendations alongside the viewed product.

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Notes on cost and pacing

Because the trigger fires per product and on every return to stock, an unfiltered flow can generate a large volume of sends. Use the recency filter on the product view, the stock check, the nighttime restriction, and the per-customer frequency cap together to keep volume reasonable and to protect customer experience. Sending costs are billed in $ based on your channel pricing.

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Recap

A well-built “Viewed Product Is Back in Stock” flow includes:
  • An automated campaign prepared in your chosen channel with the viewed product rendered inside it.
  • The Viewed Product Changed — Product Returned to Availability trigger with a per-customer frequency cap.
  • A nighttime restriction and a delay to coordinate with other availability flows.
  • Filters confirming a recent product view and current stock.
  • A subscription and contact-data check for the channel.
  • The send step, optionally enriched with related products or recommendations.