Intent
The intent of this Success Criterion is to have content authors present instructions
or labels that identify the controls in a form so that users know what input data
is expected. Instructions or labels may also specify data formats for fields especially
if they are out of the customary formats or if there are specific rules for correct
input. Content authors may also choose to make such instructions available to users
only when the individual control has focus especially when instructions are long and
verbose.
The intent of this Success Criterion is not to clutter the page with unnecessary information
but to provide important cues and instructions that will benefit people with disabilities.
Too much information or instruction can be just as harmful as too little.
The goal is to make certain that enough information is provided for the user to accomplish
the task without undue confusion or navigation.
This Success Criterion [...]