Web accessibility addresses the needs of every website visitor to achieve an optimal level of usability and ADA compliance. Many people browsing the web have a permanent disability (visual, mobility or neurological impairment), or a temporary impairment such as a broken arm, broken or lost eyeglasses, and so on. Many baby boomers have aging-related issues that make using the web more challenging, and they’re not alone–about 20% of the U.S. population has an identified disability.
You can test specific themes for compliance with these guidelines using a tool such as the WAVE Web Accessibility tool.  For sites that require 100% compliance, we recommend testing your theme of choice using the demo page for the theme, for example Twenty Fourteen. We also recommend using Header Text (displaying the Site Title), rather than a Header Image, as some WordPress.com themes will not provide AltText and therefore generate an error in the accessibility tool when a Header Image is set.
Predictable: Websites should operate in ways that are familiar and predictable. When a new page element is in focus, the website should not initiate a change of context such as opening a new window or going to a new page. In addition, the website should warn of user-initiated changes of context ahead of time, for instance through the use of a submit button. Navigation and labeling should remain consistent between different pages.
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.
As I mentioned above, under each WCAG 2.1 principle is a list of guidelines, and under each guideline are compliance standards, with techniques and failure examples at each level. Some guidelines include only Level A items; others include items for multiple levels of conformance, building from A to AAA. At each stage, you can easily see what more you would need to do to reach Level AA or AAA. In this way, many websites include elements at multiple levels of accessibility.
The ruling references the Web Content Accessibility Guidelines (WCAG) 2.0 created by the W3C’s Web Accessibility Initiative. The World Wide Web Consortium (W3C) describes itself as “an international community where Member organizations, a full-time staff, and the public work together to develop Web standards.” The complete Web standards for ADA accessibility can be found here.
Reha asked Vu if companies are obligated to comply? Vu said that unlike the physical access world, where any new building has to be compliant no matter what, there’s no such thing in the web world. The Justice Dept. hasn’t said that that’s the default, but they have said that the current regulatory regime requires it anyway. Equal access has been around since 1990.

VERY useful. I searched for a plugin that had WAVE scanning integrated and this plugin came up. I was a bit hesitant because there were only a few reviews and the price was higher than most plugins. However, if the plugin worked, it would save me $1,000 from requesting a WAVE scan of my entire site. In short, this plugin is amazing. It is super-detailed. That makes it a bit longer to learn and master. However it makes it amazingly useful. If you take compliance seriously, this is the plugin for you. I am not a developer, but understand more about coding than the average content creator. I was able to understand this plugin, though it took several hours. Don't take that as a bad thing. It was necessary, and I learned a TON about ADA compliance in the meantime. When I had a question, the author was super-fast and helpful. I highly recommend this plugin.
Comply with Section 508 and WCAG 2.1 LEVEL A/AA Web Accessibility Standards on your websites. This one of a kind WordPress Web Accessibility plugin evaluates content for Web Accessibility issues anywhere on your website. This easy to use WordPress Web Accessibility plugin evaluates your website for Web Accessibility issues when content is published or you can run a complete scan of your website to identify issues in all of your content. Accessibility reports provide references and simple to follow instructions making it easy to correct issues in your website. The basic version is limited to 25 posts or pages during full scans and is unable to identify issues found in theme files. The full version corrects many common issues automatically using convenient, time saving filter options built into the plugin. Visit our website to compare versions and review a complete list of features.

This particular lawsuit amounted to nothing more than a shakedown for cash, as the current laws would make it difficult to win the suit in court (more about this later) but it prompted me to dive deeper into the issue of ADA compliance. Through my research, I discovered there are some new laws on the horizon that could make ADA compliance mandatory, which means web designers and digital marketers need to know how to prepare.
The Federal Communications Commission (FCC) enforces regulations covering telecommunication services. Title IV of the ADA covers telephone and television access for people with hearing and speech disabilities. It requires telephone and Internet companies to provide a nationwide system of telecommunications relay services that allow people with hearing and speech disabilities to communicate over the telephone.