What is the Americans with Disability Act?

The Americans with disabilities act, also known as the ADA, is a civil rights law to ensure there is no discrimination against the people with disabilities in all the areas of public life, which includes schools, shopping centers, all public and private places open to general public etc.
In 2008, the law was updated and among the other things, telecommunication was added, so that the people with disabilities should have no problem accessing digital contents, and that includes the websites.