Which retail innovation, first introduced in 1909, fundamentally changed how products were marketed in department stores and revolutionized the customer shopping experience?

Department stores revolutionized retail in the 19th century, introducing innovative marketing strategies that still influence modern retail experiences. These 'cathedrals of commerce' pioneered fixed pricing, seasonal sales, window displays, and in-store demonstrations that shaped consumer culture. Test your knowledge about one of the most significant innovations in retail history that forever changed how products were marketed to the public.

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Self-service shopping carts
The escalator, allowing customers to move between floors while viewing merchandise
Barcode scanning at checkout
Customer loyalty cards and points programs