Guerrilla marketing is a marketing tactic in which a company uses surprise and/or unconventional interactions in order to promote a product or service. Guerrilla marketing is different than traditional marketing in that it often relies on personal interaction, has a smaller budget, and focuses on smaller groups of promoters that are responsible for getting the word out in a particular location rather than through widespread media campaigns.

Guerrilla marketing takes place in public places that offer as big an audience as possible, such as streets, concerts, public parks, sporting events, festivals, beaches, and shopping centers. One key element of guerrilla marketing is choosing the right time and place to conduct a campaign so as to avoid potential legal issues.