What consumer behavior insight helped transform the initially unsuccessful Post-it Note adhesive into a market success?

The path from invention to market success often involves unexpected twists and consumer behavior insights. Some of history's most successful products emerged from accidents, persistence, or initially overlooked applications. The Post-it Note represents one of the most fascinating product development journeys, where understanding consumer behavior transformed what could have been a failed adhesive into a billion-dollar office essential. Test your knowledge about this iconic invention's journey to market success!

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Focus groups revealed people preferred bright colors over the original pale yellow
A secretary's habit of using bookmarks in her hymnal demonstrated the practical need for repositionable notes
Market research showed people wanted stronger adhesives, leading to a formula improvement
Consumer surveys indicated people wanted larger note sizes than originally produced