Rapid prototyping is an important part of User Experience Design. In today's agile environment we are interested in getting our hands dirty. We're seeking quick wins with a new user flow or pattern to iterate on top of and enhance the overall application.
I think Sketching is misunderstood in the Tech Industry. Sketching is something everyone on your team should be doing! You'll hear it from professionals across the industry, that problem solving starts with sketching ideas. Unfortunately it seems to me that not many teams are actually taking advantage of this great practice.