Level AA is a little more significant, and makes sites accessible to people with a wider range of disabilities, including the most common barriers to use. It won't impact the look and feel of the site as much as Level AAA compliance, though it does include guidance on color contrast and error identification. Most businesses should be aiming for Level AA conformity, and it appears to reflect the level of accessibility the DOJ expects.
Whether you target a small demographic or offer services to an array of customers, you can benefit from making your website more accessible to a broader range of individuals. Reach more visitors and keep them, by allowing screen readers to describe the images to the blind, ensuring your navigation can be used without a mouse for those with physical limitations, and more.
Google and the government are already making asks around their expectations of accessibility as a cornerstone of website development. Google already rewards sites that check many accessibility boxes with higher rankings and the government has signaled that web accessibility standards will be required for government contractors. By building a more accessible website now, you may significantly impact your SEO and ranking potential, not to mention open the doors to possible work as a government contractor.
The Department of Justice’s revised regulations for Titles II and III of the Americans with Disabilities Act of 1990 (ADA) were published in the Federal Register on September 15, 2010. These regulations adopted revised, enforceable accessibility standards called the 2010 ADA Standards for Accessible Design, "2010 Standards." On March 15, 2012, compliance with the 2010 Standards was required for new construction and alterations under Titles II and III. March 15, 2012, is also the compliance date for using the 2010 Standards for program accessibility and barrier removal.
However, this doesn’t mean you should ignore ADA or web accessibility. What we do know, is that all websites should be given a good-faith-effort of becoming easily accessible. This should be the case for any user who may wish to browse your website, regardless of their disability of type of impairment. They deserve it. Making your website accessible benefits an array of individuals and businesses.