What is guerrilla marketing? The original term “Guerrilla Advertising” was invented by Jay Conrad Levinson in 1984, it is a marketing strategy that is low-cost and high-impact. Where you promote your campaign on mass in a public area at very little or no cost at all. To make this work, you have to get creative and use different ways of grabbing attention than traditional advertising techniques. You need to think bold, take risks, push limits & boundaries and get creative!