1.It’s a term that describes how accessible is site to users who use different technologies - mouse,pad,mobile device, keyboard or who have different mental or physical handicaps.
2.They use assistive technologies.
3.Semantic HTML is easily accessible to sighted users and to assistive technologies. People with handicaps can easily use the site.
- Avoid: use of abbreviations, dashes and acronyms, poorly structured sites. Avoiding the use of tables helps people with handicaps.
5.Tab index is a global attribute which enables the part of the text being highlighted when we click on it and we can move from one tabulated part to another by using the tab button.