Here the interviewer is asking you to present yourself in the best possible light, to give them your selling points for this particular role.
What They Don't Want To Hear
They do not want to hear about your life outside of work or what you do outside of work.
What They Do Want To Hear
They want to know that you have read through the job description and that you know what they are looking for. Tell them about yourself in a professional context. Think of yourself as a product, explain why people should buy you - don't just tell, sell.
Good Luck!
