loyaltyPrograms property

An optional list of loyalty programs containing applicable loyalty member prices for this product in this region.

This field is used to show region-specific member prices on Product Listing Ads (PLA). To use this, the loyalty program must be configured in Google Merchant Center, and the merchant must be using the Regional Availability and Pricing (RAAP) feature. The benefits provided must match the merchant's website and be clear to members. This is only applicable for merchants in supported countries. See Loyalty program for details on supported countries and loyalty program configuration. Also see Regional availability and pricing and How to set up regional member pricing for more information.

Optional.