Accessibility testing refers to the process of evaluating a digital product or service to ensure that it can be accessed and used by people with disabilities, including those with visual, auditory, motor, or cognitive impairments. The goal of accessibility testing is to identify and rectify any barriers that might prevent individuals with disabilities from effectively using a website, application, or software.
More info click link mention in below
https://www.testevolve.com/blo....g/what-is-accessibil