Why is accessibility testing important?

Websites that are inaccessible leave people with disabilities feeling left out. Doing testing early can assist in finding simple accessibility issues. These simple accessibility issues may also affect users without disabilities. For instance, improving colour contrast on a webpage can assist other users looking at the webpage outside in the sun.

In addition, fixing common accessibility issues found by accessibility testing can improve the search engine optimization (SEO) of a website. Improving SEO can deliver more organic traffic to a website. 

As a developer you have the opportunity to create websites that everyone can use. Accessibility testing can teach you how users with disabilities may interact with a website. This will help you to create usable webpages at every step of your development process.