Competition on digital networks and the increasing consumer use of online media have long since been forcing companies to consider strategic and operational measures involving online marketing. This textbook (entitled Online Marketing prior to this new edition) deals with the foundations, functions and mechanisms of sales policy tools that use electronic information technologies. This third edition will deal with new forms of social media marketing (e.g. influencer marketing, live stories, messenger marketing) that are emerging from the comprehensive digitization of the economy. However, other developments such as the General Data Protection Regulation (GDPR), user experience, dynamic pricing, predictive analytics and many other topics as well are also considered.