What question does Seth Godin suggest is key to an idea’s spread?

Seth Godin emphasizes the importance of remarkable ideas in their potential to spread. When he talks about the question, "Is it remarkable?", he refers to the idea that for something to capture attention and gain traction in a saturated market, it must stand out and be worth talking about. The term "remarkable" suggests that the idea should be noteworthy, either because it is unique, transformative, or intriguing enough to provoke a discussion among individuals.

Ideas that are remarkable resonate with people and often lead to word-of-mouth promotion, which is a pathway to a broader audience. This aligns with Godin's theory that marketing is no longer about just persuading people to buy, but rather creating conversations around an idea that can lead to organic growth and enthusiasm.

The other questions, while they touch on valid aspects of an idea's appeal, do not focus on the essential quality of being noteworthy or unique that is critical for spreading an idea in a meaningful way.