Why do you want to leave your current employer?

There are many reasons an employer may ask this question. They are looking to see if you were let go or if you quit jobs often. The costs and effort of onboarding a new employee are fairly high, so when an interviewer asks this question, they are trying to figure out how long they think you will stay with the company.

The importance here is to keep it positive. People rarely leave their employers because things are going well. Be honest but never speak poorly of your boss, peers, colleagues, or the company. This is also an opportunity to highlight all of your remarkable achievements.