Randomization is a technique used in research to ensure that the assignment of subjects or participants to different treatment groups is made in a random and unbiased manner. This helps to minimize bias and increase the validity of the study's results. Randomization can also help to control for potential confounding variables and improve the generalizability of the findings. By randomly allocating participants to different groups, researchers can reduce the likelihood of systematic differences between groups and increase the reliability of their conclusions. Randomization is commonly used in clinical trials, experimental studies, and other research designs to enhance the internal validity of the study.