…bviously test your design decisions on real users without worrying about wasted resources and time. I usually tend to choose people who are not that much involved in dashboard development. Also try to avoid watching someone who has already had a chance to play with the prototype before.
…lps you to understand who are you really designing for. I aim to have around four to five personas. In the best way to have personas as an actual users, this can help you identify issues while chatting or walking through your solution with them on a call or in person.