Everyone uses the Internet in their own unique way. As a result, a website should present information in such a way that users can access it regardless of the type of hardware or software they are using or how they navigate through the site. An accessible website is a website that can be used by everyone. 

Websites that aren’t compatible with screen readers, content that can’t be navigated with a keyboard, inaccessible PDF files, missing alternative text for images, multimedia without alternatives, such as transcripts, audio descriptions, or captions, missing form input labels, and low colour contrast that makes text difficult to read are all examples of common web accessibility barriers.