Even though this is a great opportunity but selling yourself can be an intimidating task. Not only you need to know your words carefully but the tone and attitude you are carrying.
Be confident. Be your own don’t be fake to impress as you will miss out the opportunity.
The interviewer wants to know how you stand out among the other applicants. Therefore, focus on one or two qualities you have that might be unique, or more difficult to find in other interviewees.
For example, if you are very experienced with a certain skill that the job requires, say so. This is your chance to tell the interviewer why you would be an invaluable employee.
The question is: why should we hire you? This is a great question. There is not one reason or one talent that fits me for this job because I am still learning. When it seems to hold a challenge that is close to what I have done before, but a step forward — otherwise I’d be repeating what I have already done before.