This document discusses the benefits and uses of sketching in user experience (UX) design. It notes that sketching is popular in the UX field and there are many resources available, both online and in software/books. Sketching is typically used early in the design process for discovery, idea generation and exploring scenarios. The document emphasizes that sketching is about idea generation and problem solving rather than visual perfection. It is useful for defining personas, stories and contexts beyond just the user interface. While quick and low-cost, sketches also have limitations as they lack detail and clarity.