Be specific. Some companies track how well
different methods of advertising for positions
work for them. If a current employee of the company (or
someone the interviewer knows) recommended you, by
all means, name names!
Some companies have regulations about relatives
working for or with each other. Be honest. If the
employer finds out later that your cousin is your
supervisor, it may mean immediate dismissal.
To answer this question effectively, you must know
what the company's goals are. Before your interview,
you should ask about the company's mission statement,
which will clue you into their goals.
Talk about what makes you qualified for the position.
Also, if a company employee recommended that you apply,
name name.
The interviewer wants to know what makes this
company stand out in your mind.