In simple word: Email marketing is straight marketing a commercial message for a group of people using email. In its broadest sense, every email sent to a potential or current client could be considered email marketing. Email marketing occurs when a company sends a commercial message to a group of people by use of electronic email. Most commonly through advertisements, requests for business, or sales or donation solicitation, any email communication is considered email marketing if it helps to build customer loyalty, trust in a product or company or brand recognition. Email marketing is an efficient way to stay connected with your clients while also promoting your business.