WCAG principles

The Web Content Accessibility Guidelines organize accessibility into 4 essential principles known as POUR. Each principle addresses different aspects of how users interact with digital content and services.

The POUR principles include:

• Perceivable means users must be able to detect content through at least one of their senses. This includes providing text alternatives for images, captions for videos, and ensuring content can be presented in different ways without losing meaning.
• Operable ensures users can interact with all features regardless of how they use technology. Products must work with various input methods like mouse clicks, keyboard commands, voice control, or assistive devices.
• Understandable requires content to be clear and logical. Navigation should be consistent, instructions should be simple, and users should be able to comprehend and process information at their own pace.
• Robust means content must work reliably across different technologies. Products should remain functional across various browsers, devices, and assistive technologies like screen readers or magnification tools.