Web Content Accessibility Guidelines (WCAG) are a set of recommendations developed to ensure that web content is accessible to all users, including those with disabilities. These guidelines help create web pages that can be easily navigated and understood by people with various impairments, thus promoting inclusivity in digital spaces. WCAG emphasizes the importance of cognitive ergonomics and user interface design by providing practical criteria for making content perceivable, operable, understandable, and robust.