What does this mean?
The aria-description attribute is being used.
Impact on users
This attribute is still in the draft spec for ARIA and generally not well supported so can either have no effect at all or can generate some undesirable results.
At the moment for example the attribute is not announced by JAWS and with NVDA it is announced but the description is read before the accessible name (the reverse of what should happen).
How to fix
Don't use aria-description. Use aria-describedby instead.