This paper provides a technical outline of the basics of online marketing. The outline includes an introduction to digital marketing and strategic planning and development. Our contribution offers theoretical and practical insights relative to this growing marketing area, with information on the main areas for which online marketing is particularly suited: the E-commerce section explores different business models and what techniques are used for their development; Web Search Marketing focuses on SEO and SEM, as well as in keyword selection for optimization; E-mail Marketing offers interesting content to develop a successful newsletter; and Social Media Marketing addresses planning and the most important tools used to maximize communication through social media. In a nutshell, this chapter offers an overview of digital marketing and its strategies for an active and effective Web presence.