Accessibility
Accessibility (a11y) means that websites are designed and developed so that everybody can use them, regardless of visual, auditory, speech, motor or cognitive impairments.
Accessibility is not limited to providing a usable website for impaired people; an accessible website also benefits people without impairments. For example, people can have temporary disabilities, such as a broken arm or lost glasses. Or people can encounter situational limitations, such as bright sunlight when using their smartphone.
Accessibility is part of the whole process of creating a website, from designing a website to building it. Considering accessibility from the start of the project leads to improved overall usability and a better web for everyone.