Engagement marketing involves two-way and three-way communication between businesses and consumers through various platforms. It has evolved from one-way communication like print ads to conversational communication through social media and events. Engagement marketing allows businesses to directly interact with consumers, understand what they like and don't like, and involve them in the brand. It is important for small businesses to start with a few engagement marketing priorities and get creative with limited budgets through word-of-mouth, social media, and websites.