Email marketing is directly marketing a commercial message to a group of people using electronic mail email. wikipedia.org

Marketing management is the organizational discipline which focuses on the practical application of marketing orientation, techniques and methods inside enterprises and organizations and on the management of a firm's marketing resources and activities. wikipedia.org

Marketing communications (MC) uses different marketing channels and tools in combination: Marketing communication channels focuses on any way a business communicates a message to its desired market, or the market in general. A marketing communication tool can be anything from: advertising, personal selling, direct marketing, sponsorship, communication, promotion and public relations. wikipedia.org

Management in business and organizations is the function that coordinates the efforts of people to accomplish goals and objectives using available resources efficiently and effectively. wikipedia.org

Organizational behavior (OB) is the study of human behavior in organizational settings, the interface between human behavior and the organization, and the organization itself. wikipedia.org

Employee engagement is the level to which an employee is absorbed by and enthusiastic about their work and so takes positive action to further the organization's reputation and interests. wikipedia.org