Most questions contain key terms and instruction terms.

These might sometimes be implied rather than directly stated.

'Examine the significance of Iago's role in Othello'

'Examine' here is an instruction term. It is telling you to discuss the topic in a general manner.

'Iago's role' is a key term. It tells you to focus on this particular aspect of the play.

It is also setting a limit to the question. You do not need to discuss the other characters.

Key terms are determined by the subject in question.

Instruction terms tell you how to approach the question.