Design Thinking is a methodology that uses a human-centered approach to solve complex problems. It involves 5 stages: empathizing to understand user needs, defining the problem, ideating potential solutions, prototyping solutions, and testing prototypes. The document then provides details on each stage, including techniques like empathy mapping, brainstorming, prototyping, and usability testing. The goal is to develop solutions to problems by understanding human experiences and testing ideas iteratively.