The digital world is increasingly the natural habitat of children, adolescents and young adults. This challenges professional pedagogical work to address the associated opportunities and risks in a professional manner. The YOWOMO2.0-Train partnership - a European consortium of nine organisations from the fields of youth work, vocational education and training and research and development - has developed training courses for both youth work professionals and their trainers in order to acquire the necessary competences for youth work in the ager of smartphones and social media. These trainings are developed in a version for classroom teaching (e.g. continuing education courses, in-house trainings) and for online learning (Massive Open Online Courses). To develop these training courses, the consortium (1) carried out field analyses in the form of stakeholder interviews and focus groups, (2) analysed and integrated existing competence descriptions (YOWOMO2.0; Developing Digital Youth Work), (3) developed extensive material for the practical implementation of training for both professionals and their trainers (curricula, module descriptions, lesson plans, assignments, assessments), (4) tested the developed material in pilot trainings, and (5) presented the results for discussion in various regional, national, European and international meetings. This showed that the results of the partnership were both practically feasible and linked to the expert discussion on digital youth work.All trainings are based on the following four interlocking didactic approaches: (1) Situated learning, (2) Problem-oriented learning, (3) Self-directed learning, and (4) Discovery Learning. The offline version of the training for professionlas consists of seven modules: (1) Digital relationship, (2) Online attitude, (3) Ethics and practice, (4) Legal framework, (5) Social Media and Public Relations, (6) Professional network, and (7) Qualitymanagement. The training for future trainers consists of two parts: (1) a one-day kick-off training to introduce the trainees to the training of skilled workers and (2) flexible informal support for trainees during the implementation of the first training course for professionals (including final assessment). Both the materials for the training of professionals and the trainer training are freely available in the seven languages of the partnership (English, Dutch, German, Polish, Romanian, Italian, Turkish) on the Internet at the address https://yowomo.euThe English language online courses for both professionals and trainers are implemented on the Online Learning Platform Eliademy (https://eliademy.com). The MOOC for professionals comprises modules which are based on the contents of the offline training, but which focus more clearly on the contents of the modules which have proven to be of particular practical relevance for professionals. Therefore, the MOOC comprises the following three modules: (1) Digital relationship (To whom you are talking to - Identifying your target group; Good rapport - How to build professional relationship online; Media richness -The ladder of opportunities), (2) Online attitude (Online identity; Online influence and manipulation - Dysfunctional behaviours; The new normal; Are you also a professional when you are online?), (3) Ethics and practice (Moral compass - Ethics in your work; New acting - protocol). The MOOC for trainers includes modules based on the content of the offline training. Instead of flexible informal support, however, it offers information on the further development of one's own trainer skills. The MOOC comprises the following modules: (1) Introduction to the YOWOMO project and training, (2) Didactical approaches, (3) Training material, (4) Tips and tricks, and (5) How to become a better YOWOMO trainer. Both MOOCs are freely accessible.