Hewitt's Law states that the amount of information a person can effectively process is limited. This principle suggests that as the complexity of information increases, the ability to understand and retain that information decreases. Essentially, it highlights the challenges of cognitive overload in learning and communication. The law is often applied in fields like education and information technology, where simplifying content can enhance comprehension. By recognizing these limits, educators and designers can create more effective materials that align with how people naturally process information, leading to better learning outcomes and user experiences.