Email campaigns are ways businesses communicate with their audience by email. There are three main types: newsletters, drip campaigns, and promotional campaigns. Newsletters send regular updates like news and tips to keep subscribers informed. Drip campaigns send a series of automated emails over time to guide subscribers step-by-step, often to nurture leads. Promotional campaigns focus on sending sales offers and discounts to encourage purchases. The process starts by choosing the campaign type based on the goal, creating content suited to that type, sending the emails to the audience, and then tracking how subscribers interact with the emails. Tracking helps improve future campaigns by understanding what works best.