While legal considerations might be your biggest worry, making your site more accessible is simply good customer service. More than 39 million Americans are blind and another 246 million have "low vision," Another one million are deaf in the U.S. Add to that people with mobility issues that prevent them from using their hands and that's a huge portion of the country's buying power.
Nice Article! It is very important to work under guidelines if you don’t want to get sued and don’t want to pay the penalties. But more importantly it is better to give each user hassle free user experience over your website. Being ADA Compliant means your website works well for people with disabilities and they can easily access and navigate your website.