Email marketing is a digital marketing strategy in which businesses send emails to a targeted group of people to promote products, share updates, and build relationships with customers. It includes different types of emails such as promotional offers, newsletters, welcome messages, and automated campaigns that are sent based on user actions. A successful email typically has an engaging subject line, personalized content, a clear message, and a strong call-to-action that encourages the reader to take the next step. Email marketing is widely used because it is cost-effective, easy to automate, and allows businesses to directly communicate with their audience while tracking performance through metrics like open rates and click-through rates.