Tumor models are used in research to study the behavior and characteristics of tumors in a controlled laboratory setting. These models can be generated using cell lines, animal models, or patient-derived samples, and are used to investigate various aspects of tumor biology such as growth, metastasis, and response to treatment. Tumor models are essential tools for understanding the complex mechanisms underlying cancer development and progression, as well as for testing potential new therapies and treatment strategies. By studying tumors in a controlled environment, researchers can gain valuable insights into the molecular and cellular processes involved in cancer, and ultimately work towards developing more effective ways to diagnose and treat the disease.