Email marketing is a digital marketing strategy that involves sending commercial emails to a targeted group of people to promote business offerings, build relationships, and engage customers. It typically includes sending newsletters, promotional offers, product updates, and personalized content aiming to nurture leads and generate sales. Email campaigns are carefully crafted with compelling subject lines and clear calls-to-action, targeting specific subscriber lists to maximize effectiveness. This method is cost-effective, measurable through metrics like open rates and conversions, and delivers a high return on investment by allowing direct communication with potential and existing customers in their inboxes.