Web Content Accessibility Guidelines (WCAG) are a series of web accessibility guidelines developed with the aim of providing a single shared standard for web content accessibility. Coursera's WCAG catalogue teaches you how to make digital content more accessible to a wider range of people with disabilities. You'll learn about the four principles of accessibility: perceivable, operable, understandable, and robust, and how to apply them in designing and developing web content. This includes understanding how to create accessible text, images, multimedia, web forms, and navigations. You'll also be guided on how to evaluate a website’s accessibility and make necessary improvements, aiming to create an inclusive digital world.