When a customer installs your wallet pass on their device, you gain a new direct communication channel to convey your brand. Often, it makes sense to communicate certain promotions or messages through a more direct channel than email, and this is where push messages should be integrated into your regular marketing automation tools.
On Shopify Flows, you'll find pre-built actions and triggers ready to use. One of the actions is the "Send Push Notification," which requires three parameters: customer email, notification header, and notification body. With this action, you can integrate push notifications into your customer journey.