Digital accessibility addresses the ability of people with visual, auditory, motor or cognitive disabilities to access electronic resources such as the Internet, software, mobile devices, e-readers, etc. It also includes people with changing abilities due to aging and temporary conditions due to accidents or illness.
Basically, digital accessibility is technology put into place to allow a wide range of users to easily navigate the digital space. When building digital channels without including basic accessibility requirements, barriers are inadvertently created that exclude people from using those channels. When access to the digital world is available to all, it can remove barriers to communication and interaction that many people face in the physical world.
Adding accessibility tags to PDF files to make sure that people who use screen readers and other assistive technologies can read and navigate a document with Tables of Contents, hyperlinks, bookmarks, alt text, and so on. Accessibility tags also make it possible to read the information on different devices, such as large type displays, and mobile devices. In Office for Windows, Office for Mac, and Office for the web, you can add tags automatically when you save a file in PDF format.