What is the difference between theoretical and applied research, and how do they each contribute to advancing knowledge in a specific field?

Theoretical research focuses on developing new theories and understanding concepts, while applied research aims to solve practical problems and implement solutions. Theoretical research contributes to advancing knowledge by expanding our understanding of fundamental principles, while applied research helps in the real-world application of theories to address specific issues and improve practices in a field. Both types of research are essential for advancing knowledge and driving progress in a specific field.