1. Accessibility = WCAG + Usability
The ability to assess anything in life requires a standard by which to measure things. With Keyboard accessibility, there are two essential standards to guide our efforts: WCAG and Usability.
These two standards work together, one leading into the other like a river flows into an ocean.
WCAG tell you how to approach the task of creating and assessing your success, while actual usability reveals the ultimate truth of whether or not your content can truly be used via the keyboard with the same ease and efficiency as other interface input options.