Email greetings are the opening lines of an email that set the tone for the message. They typically include a salutation, such as "Dear," "Hello," or "Hi," followed by the recipient's name. The choice of greeting can vary based on the relationship between the sender and recipient, as well as the formality of the email. Using appropriate email greetings is important for effective communication. A formal greeting, like "Dear Mr. Smith," is suitable for professional correspondence, while a casual greeting, such as "Hi Sarah," works well for friends or colleagues. Choosing the right greeting helps convey respect and establishes a positive rapport.