@degenvick
As someone building a product these are some questions you need to ask yourself
➛How smooth and easy is it to spread your idea?
➛ How often will people sneeze it to their friends?
➛ How tightly knit is the group you’re targeting, do they talk much?
➛ How reputable are the people most likely to promote your idea?
➛ How persistent is the idea, is it based on mainly hype of the market at that time?
Or is the idea a long term one?(probably you invest more in spreading it over time)
I also call this the 5 Hows