Which retail company holds the Guinness World Record for the largest advertising campaign ever, measured by simultaneous reach across 56 countries in 2012?

The world of retail has seen some extraordinary advertising campaigns over the years, but one stands out as the official Guinness World Record holder for the largest retail advertising campaign ever conducted. This campaign broke boundaries in terms of reach, engagement, and measurable impact on consumer behavior. Test your knowledge about this remarkable achievement in retail marketing history that forever changed how brands approach large-scale promotions.

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Coca-Cola's 'Share a Coke' personalized bottle campaign
Samsung's 'Launching People' global product launch
IKEA's 'Catalogue Launch' synchronized marketing event
Amazon's 'Prime Day' synchronized global sale