What are Access Keys?
Access keys are keyboard shortcuts that are intended to help users who have difficulty in using pointing devices such as a mouse. They are intended to simplify navigation for people using special devices such as screen readers by delivering quick access to important links. Users that can view a full web page already have this quick access because important links can be made to stand out on the page using numerous visual methods.
In terms of accessibility, the idea of the access keys does not deliver.