These proceedings represent the work of researchers participating in the 4th European Conference on Social Media (ECSM 2017) which is being hosted this year by Mykolas Romeris University, Vilnius, Lithuania on 3-4 July 2017. ECSM is a recognised event on the international research conferences calendar and provides a valuable platform for individuals to present their research findings, display their work in progress and discuss conceptual and empirical advances in the areas of social media. It provides an important opportunity for researchers and practitioners to come together to share their experiences of researching in this varied and expanding field. The conference this year will be opened with a keynote presentation Dr. Edgaras Leichteris, who will address the topic Society in the cloud - what is the future of digitalization? The second day of the conference will be opened by Daiva Lialyte who will be talking about Practical point of view: push or pull strategy works on social media? With an initial submission of 115 abstracts, after the double blind, peer-review process there are 40 Academic Research papers, 10 PhD Research, 3 Masters Research and 1 Work in Progress papers published in these Conference Proceedings. These papers represent truly global research in the field, with contributions from Australia, Austria, Canada, China, Colombia, Czech Republic, Denmark, Egypt, Finland, Germany, India, Ireland, Italy, Japan, Lithuania, The Netherlands, Poland, Portugal, Russia, Slovakia, Slovenia, South Africa, Spain, Turkey, United Kingdom and United States of America.