This introductory information section is for developers who want to learn about the importance of web accessibility and the concepts involved when implementing a11y support into code.
If you already know about the applicable accessibility laws and wish to dive right into practical application, we recommend reading the Accessibility concepts and standards page. This page starts off by comparing three different code examples of a button and illustrates the advantage of using "proper" accessibility techniques to make it accessible. WCAG guidelines tend to be dry, verbose, and narrowly focused, so this side-by-side comparison should provide an clear, understandable context for understanding why semantic HTML is important.