The Web Content Accessibility Guidelines (WCAG), developed by W3C, establish international standards to enhance web accessibility, forming the basis of global accessibility laws. Version 2.0 outlines four core principles: perceivable, operable, understandable, and robust, aiding developers in creating web content that is accessible to users, including those with disabilities. The document emphasizes best practices, such as proper use of headings, descriptive alt text for images, and careful color selection, to ensure that all users have equitable access to information online.