Guerilla marketing is a creative and unconventional approach to promoting a product, service, or brand, often using low-cost and high-impact tactics to reach a specific target audience. It involves thinking outside the box and using unexpected methods to capture the attention of potential customers, such as flash mobs, viral campaigns, and street art. This type of marketing relies on the element of surprise and aims to create a buzz and generate word-of-mouth advertising. It is a strategic and agile form of marketing that can be highly effective in cutting through the clutter and standing out in a crowded marketplace.