If you have used guerrilla marketing before, explain what you did and how it helped the company. If you haven't used guerrilla marketing before, you can talk about your interest in the method and your willingness to learn more about it. Try to show the interviewers that you are aware of high-creative low-cost marketing strategies and that you are aware of the importance of not wasting money

"I have utilized guerilla marketing techniques in the past as a way to drive publicity and brand awareness. In my past marketing role, I encouraged our team to consider guerrilla marketing methods to help us stand out from their competitors and generate buzz on social media. A well-thought-out guerrilla marketing campaign can take consumers by surprise and create an emotional reaction. Emotional people are more likely to spread the word to their friends and family and take action - for example, purchase your product or service."