Use PickZen to discover the real problems and needs of your users. Test your hypothesis before building a prototype or MVP. With skip logic, you can ask follow-up questions based on the answer of previous ones. This way, you gain detailed insight for each user.
Once you have validated your hypothesis, validate that your product meets a demand and solves a real problem. Build a low-fidelity MVP, take a video and add questions to gain valuable feedback before building the actual product.
Even when your business works, you can always improve your product. If you have a web-based startup, ask questions to optimize usability. Are users spending a lot of time on a page? Ask why! Are users going back and forth without doing anything? Ask why! Are new users leaving too soon? Ask why!