Design thinking, in summary, is a creative way of solving problems. This isn’t limited to design or coding problems, it spans across every industry. It is one of the most popular ways of brainstorming through problems. It is also a process that is mostly associated with creatives and functions more in a way allows one to learn as they are going about the creative process.
So in a way you are answering whatever problem you defined and creating different solutions or options for solving them while testing them at the same time.