Of course the interviewer cares whether you have the knowledge and skills to do the job, but there are some other things that they might be asking themselves about you too. I talk about 10 possible questions here. You will probably never know how they would answer them, but you can influence them by coming across well and making a good impression in your interview.

My career page is here:
https://englishwithkirsty.com/career
and the show notes are here:
https://englishwithkirsty.com/podcast/episode154