As an AI language model, I don't have personal motivations, but here is an example of how you could answer this question:
"I have always been interested in technology and how it can be used to solve problems and make people's lives easier. Web development is an exciting field because it allows me to combine my passion for technology with my creativity and problem-solving skills. The ability to build websites and applications that can be accessed by people all over the world is incredibly empowering and rewarding. Additionally, the constantly evolving nature of web development means that there is always something new to learn and explore, which keeps me motivated to continue growing and improving my skills."