The fourth industrial revolution is characterized by the introduction of the Internet of things (IoT) and Internet of Services (IoS) concepts into manufacturing, which enables smart factories with vertically and horizontally integrated production systems. The main driver is technology, as Industry 4.0 is a collective term for technologies and concepts of value chain organization. Digital manufacturing platforms play an increasing role in dealing with competitive pressures and incorporating new technologies, applications, and services. Motivated by the difficulties to understand and adopt Industry 4.0 and the momentum that the topic has currently, this paper reviews the concepts and approaches related to digital manufacturing platforms from different perspectives: IoT platforms, digital manufacturing platforms, digital platforms as ecosystems, digital platforms from research and development perspective, and digital platform from industrial equipment suppliers.

E-marketing is the concentration of all efforts in terms of adapting and developing marketing strategies into the virtual spaces: web, social media… In an e-commerce site, e-marketing must help consumers in their purchase. This requires precise knowledge of the customer´s preferences. For this reason, holders of e-shops must find out to whom, to what, how and when to refer to the customer, ergo, to know the "consumer decision journey" and strengthen their engagement. This analysis is obtained when the customer is visiting an e-shop because (s)he leaves a digital footprint that can be used to understand his/her needs, desires and demands as well as to improve web presence. These data can be used for data mining to understand the e-marketing and selling processes in a better way. In this paper a survey of 86 e-shops in Spain is presented. In the conclusions, some ideas for good emarketing practices related to the buying behaviour analysis of customers are shown. Hence, new trends in e-marketing are suggested from a strategic, tactical and operational level in which different data mining techniques ease the purchase and the engagement.

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