It will help you to decide what to do with the generated idea.
New:
There would different levels of new.
An Idea can be new to you, new to your peer group, new to an industry or new to the world. Obviously these are massively different and can have a wildy different impact.
Idea can be really powerful when its only new to an Industry.
Ex: Application of Hendry Ford style production to a food industry(Burger Restaurant) to increase speed and consistency.
High Value:
Diff people value ideas in diff ways. For some it is about the idea’s potential to generate income, for some it is to stand out of the competition and for others it to make feel something.
So, when working with ideas, have it clearly defined in the upfront. So you can have better chance of achieving it and makes it easy to judge.