Special attention should be paid to the construction of web pages so that they can be easily "viewed" by people using computer software and equipment such as screen readers, Braille output devices, or non-standard input devices.
The Accessiblity tab allows you to check for accessibility issues on your pages (i.e. missing "alt" tags for images) so that your content will be available to all audiences.
Learn more about Accessibility, Section 508 Standards and ADA Guidelines.