It’s good for implementing new ideas. It can sell an idea better than another form of a textual description of the design. With the use of prototypes, it’s easy to get buy-in from stakeholders because they’re able to try the product and feel the experience.
Here, you can learn about your issues and it allows your team to gain in deep knowledge of the issue they need to resolve.
It’s a communication tool. You can ‘play’ with a designer’s concepts and provide valuable feedback.
It’s a validation tool because it manages the usability. You can show the prototype to the users and ask them to go through regular user flows is greatly insightful.
It enables designers to test user journeys and find potential problems throughout the interaction flow at a very early stage.
Seeking validation early in the product lifecycle will help designers identify the features that most resonate with their users and focus design and development efforts in the right direction.
While doing user research it helps you and also brings light to the preferences of your target user. Prototype testing saves your money and time instead of developing the wrong solutions.