How do you define growth marketing or, as it's sometimes called, growth hacking?
Growth marketing (aka growth hacking) can mean different things to different people. The interviewer wants to make sure that you're both on the same page and that you will fill the role in such a way that meets their expectations. Prior to the interview, practice reciting your answer so you can give it confidently. Keep your definition relatively broad so it's likely to align with their expectations.
"While I know that growth marketing can vary from company to company, I personally define it as data-driven digital marketing. It requires one to be both creative and analytical, which is why it's such a great fit for me. As a growth marketer, I design and conduct experiments, and then analyze the results, in order to optimize digital marketing initiatives, metrics, and target areas."
"I define growth marketing as the practice of identifying how to grow a business by defining your target audience, earning the trust and brand loyalty of that audience, and developing the best strategies for that business and their brands. In order to retain customers and to find new ones, you have to retain your value and what you have to offer. So you have to be customer driven and focussed."