Demand is indeed the power source of design, and the designer's job is to design products or solutions to meet the needs of users. However, the essence of design is not just a simple response to demand, but more importantly, it is an exploration process. By exploring and solving existing problems, creating new values and optimizing existing schemes, better user experience and customer value can be achieved.

Therefore, the essence of design is an iterative process. Through constant challenges and improvements, products and solutions are constantly optimized to achieve better user experience and higher commercial value. This process requires designers to conduct in-depth user research, market analysis, innovative ideas, prototype design, testing and iteration, and needs constant optimization and adjustment to adapt to changes in the market and changes in user needs. What needs to be emphasized is that designers should always pay attention to users' needs, but they should also have enough sensitivity and judgment to grasp the direction and goal of design, so as to create successful and complex products or solutions.