Reality checks are techniques used to determine whether you are in a dream or awake. They often involve questioning your surroundings or performing specific actions, such as looking at a clock or trying to push a finger through your palm. If the results are unusual or unexpected, it may indicate that you are dreaming. These checks are commonly used in lucid dreaming practices, where individuals aim to gain awareness and control within their dreams. By regularly performing reality checks during waking hours, people can increase the likelihood of recognizing when they are dreaming, enhancing their dream experiences.