They do. They can differ in importance, though. The specifics of the product used to be less important. Now with a lot of web and app-based businesses, it's

They do. They can differ in importance, though. The specifics of the product used to be less important. Now with a lot of web and app-based businesses, it's like you can't really explain the opportunity fully without showing the way it works with a mock-up. So that's why they suggest it's a more vital first step to pitching your business idea.