Which linguistic innovation in advertising, first popularized in the 1950s-60s, created the concept of 'unique selling proposition' and fundamentally changed how language is used in retail marketing?

The intersection of linguistics and retail marketing has produced some of the most memorable and influential advertising campaigns in history. Certain linguistic innovations have fundamentally altered how brands communicate with consumers, creating new vocabulary and communication patterns that persist in our cultural lexicon. Test your knowledge about a groundbreaking linguistic development in retail advertising that forever changed how products are marketed worldwide.

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The use of 'you-centered' language that directly addresses the consumer
Comparative advertising with phrases like 'better than' and 'more effective than'
The '-er' suffix in product names to suggest superiority (cleaner, brighter, stronger)
The 'before and after' narrative structure in product demonstrations