In ancient Rome, what innovative advertising technique did merchants use to promote their shops and products throughout the city?

Before modern retail, ancient civilizations developed sophisticated commerce systems that shaped early marketing and sales techniques. Many of these innovations continue to influence modern retail practices. Test your knowledge about how ancient merchants promoted their products, organized marketplaces, and created lasting brand identities in the ancient world.

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Painted murals on shop walls depicting products and services offered
Distributing clay tablets with product information to potential customers
Releasing trained birds that would sing promotional jingles in public spaces
Mounting stone billboards at city gates with carved product advertisements