This document provides an overview of guerrilla marketing. It begins with a brief history, explaining that the term was coined in 1983 to describe unconventional marketing techniques for small businesses to compete against larger competitors. It then explores various guerrilla marketing techniques like ambient marketing, viral marketing, and mobile marketing. The document also discusses challenges like avoiding offense while seeking attention. It notes that guerrilla marketing remains effective for both small and large companies due to its ability to cut through advertising clutter and engage customers.