In ancient Rome, what retail innovation did merchants use to create brand recognition for their shops when most customers couldn't read?

Before modern retail stores and digital marketplaces, ancient civilizations had their own sophisticated commercial systems. From the bustling agoras of Greece to the elaborate trade networks of Mesopotamia, these early marketplaces established commercial practices we still use today. Test your knowledge about how ancient merchants promoted their products, built customer loyalty, and created the foundations of modern retail and brand development!

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Pictorial shop signs that depicted the goods sold within (like a fish for fishmongers or bread for bakers)
Trained parrots that would call out to passersby with memorable phrases about the shop's offerings
Color-coded awnings that were standardized across the empire (red for food, blue for textiles, etc.)
Musical instruments played in specific patterns that became associated with different types of shops