Which groundbreaking advertising campaign from the 1950s introduced the concept of 'Unique Selling Proposition (USP)' that revolutionized modern marketing?

The 20th century saw remarkable innovations in advertising and product promotion that shaped our consumer culture. Before digital marketing and social media campaigns, companies pioneered creative techniques that revolutionized how products were sold. This trivia question explores a pivotal moment in advertising history that fundamentally changed the relationship between brands and consumers. Test your knowledge of how historic marketing innovations transformed commerce!

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Rosser Reeves' Anacin campaign claiming 'Fast, Fast, FAST Relief'
David Ogilvy's Rolls-Royce campaign with the headline 'At 60 miles an hour the loudest noise comes from the electric clock'
Leo Burnett's Marlboro Man campaign featuring rugged cowboys
Bill Bernbach's Volkswagen 'Think Small' campaign for the Beetle