Web accessibility is a set of design guidelines, rules, code standards, and behaviors. They are used to enable people with disabilities, which comprise 20% of the world’s population, to use websites effectively.
To achieve this, the W3C (The World Wide Web Consortium) has created the Web Content Accessibility Guidelines 2.1 (WCAG 2.1), which guide developers on how to make websites accessible.
The WCAG focuses mainly on three areas of accessibility: blind people using screen-readers (JAWS, NVDA), people with motor impairments who use only keyboards, and a variety of other disabilities such as color blindness, epilepsy, and minor visual impairments that are mainly focused on the UI and design of the website (color contrasts, animations, fonts, etc.).