This article applies to the Reward Campaigns program only. 

If you want to give your customers different rewards campaigns based on the used channel, whether this order has been placed online on a Shopify store or through Shopify POS, you will be able to do this through the "place_order" event.

While creating a reward campaign with type Action-Based, you can use the "Source" key to differentiate between a POS and an Online store.

This key will always return "web" and "POS" to let you differentiate. So, in case you want this campaign applied to both channels, do not use this key and use it to separate both channels.