Virtual reality immerses users in a digital environment, replacing the real-world environment. Augmented reality overlays digital content on the real world. Mixed reality combines aspects of augmented and virtual reality by overlaying digital objects that interact with the real world. The primary differences are that virtual reality completely replaces reality while augmented and mixed reality digitally enhance the real world. Both are works in progress, with virtual reality being more developed currently and augmented/mixed reality facing greater technical challenges but holding promise to transform how people experience digital content.