You've probably known people, maybe a neighbor or a co-worker, with a reading disabililty or attention-deficit disorder. So you know how users may struggle to write down information (e.g., fill out a form) or comprehend the information on web pages.
People with Disabilities
Ensuring That Users of All Abilities Can Use Your Product
A product that is technically accessible might still be unusable, especially for people with disabilities using assistive technology. Accessibility testing involves measuring the ease in which users can complete common tasks on your website.