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 marketers send based on user actions. A successful email typically uses an engaging subject line, delivers personalized content, presents a clear message, and includes a strong call-to-action that encourages the reader to take the next step. Businesses widely use email marketing because it offers cost-effectiveness, supports easy automation, and helps them directly communicate with their audience while tracking performance through metrics like open rates and click-through rates.