Which 1950s advertising innovation is credited with creating the concept of 'brand personality' and revolutionizing how products were marketed to American consumers?

Before digital marketing and social media campaigns, companies had to find innovative ways to capture consumer attention. The early to mid-20th century saw some of the most creative advertising techniques that revolutionized how products were marketed and consumed. This question explores a pivotal moment in advertising history that changed consumer behavior and product marketing forever.

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The Unique Selling Proposition (USP) approach pioneered by Rosser Reeves
The 'Creative Revolution' led by Bill Bernbach's Volkswagen campaigns
The 'Motivational Research' techniques developed by Ernest Dichter
The 'Hidden Persuaders' subliminal advertising method by James Vicary