I always had a hard time with this one, I just say successful lmao.
I don't know the ins and outs of your company, what any kind of progression may look like, what opportunities will present themselves, etc, the question just always seemed odd.
I bring 12 years of experience with system x and system y. I'm an engineer but I enjoy selling customers solutions, not just telling them what they need to buy.
You're supposed to do a throughout research on the company, and write a nice little story how much you're a fan of the company, and how much you want to work there, and you spent all your life on training to be able to work at a company like that.