POUR principles (Perceivable, Operable, Understandable, Robust)

The POUR principles are guidelines to make digital content accessible to all users. "Perceivable" means information and UI elements must be presented in ways that users can perceive—like text, images, or audio. "Operable" ensures users can interact with the interface using many input methods, such as keyboard or mouse. "Understandable" means information should be clear and easy to follow, with predictable navigation. "Robust" indicates content must work reliably across different devices, browsers, and assistive technologies. Together, these principles help create websites and apps that are inclusive and usable by everyone, regardless of their abilities or technology used.