The purpose of the study is why you want to study this thing, what is the reason for studying this thing, write clearly, go from shallow to deep, dig deep meaning, don't stay on the surface description, you need to explore the core of the problem in depth and solve a problem.

The significance of research is what you can gain after studying this thing, such as what value you can have and what breakthroughs you can make. Generally, there is no need to write what gaps have been filled, because filling gaps is a major discovery, and general research is based on previous research, with slight improvement, perfection or improvement.

The key point is clear and logical.