The pressure to adapt is growing. But in the United States, some small-business owners do not understand the complexities of digital payments. “Smaller merchants, they don’t always have the knowledge and resources to know what to do,” said Ginger Siegel, who leads the North America small-business segment at Mastercard, which offers training to business owners like Ms. Otis of Comma Bookstore. Ms. Otis said she noticed an increase in sales when she began offering mobile payments, which made the checkout process faster. “As a retailer, you want to make the experience as efficient as possible,” she said.

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Persons: ”, Ginger Siegel, Otis Organizations: Boku, Merchant Machine, North, Mastercard, Comma Locations: United States, Britain, London, North America