What is the accessibility?
Keeping this in view, what do we mean by accessibility?
Accessibility is the degree to which a product, device, service, or environment is available to as many people as possible. Accessibility can be viewed as the "ability to access" and benefit from some system or entity.
In this way, what is the use of accessibility?
Accessibility features are designed to help people with disabilities use technology more easily. For example, a text-to-speech feature may read text out loud for people with limited vision, while a speech-recognition feature allows users with limited mobility to control the computer with their voice.
Web accessibility means opening accessibility of the Web to everyone, specifically those who have disabilities, allowing them to perceive, understand, navigate and interact with the Web. Tools do exist that assist website developers in making their sites more accessible for those with disabilities.