Theoretical models are simplified representations of complex systems or phenomena used to understand, explain, or predict behaviors. They help researchers and scientists visualize concepts and relationships, making it easier to analyze data and draw conclusions. These models can be mathematical, physical, or conceptual, depending on the field of study. In various disciplines, such as physics, economics, and psychology, theoretical models serve as frameworks for testing hypotheses and guiding experiments. They can evolve over time as new data becomes available, allowing for refinement and improved accuracy in understanding the underlying principles of the subject matter.