“For merchants with a loyal customer base, mobile payment functionality is a helpful addition to a merchant-specific mobile wallet that allows customers to earn loyalty rewards, save gift cards, and redeem coupons,” said Chris Tweedt, a research analyst at Parks Associates. “These merchants should use payment functionality from within the wallet to alert customers about coupons and offers as they make a purchase and to link transactions to specific customers in order to effectively validate marketing campaigns, evaluate merchandise strategies, segment shoppers, and improve ad targeting.

From the article "Shoppers Prefer Retailers’ Payment Apps To Apple Pay, Android Pay: Report" by Chantal Tode.