This book chapter presents initial results available from the European Commission H2020 5G PPP Phase 2 project SaT5G (Satellite and Terrestrial Network for 5G). It specifically elaborates on the selected use cases and scenarios for satellite communications positioning in the 5G usage scenario of eMBB (enhanced Mobile Broadband), which appears the most commercially attractive for SatCom (Satellite Communications). After a short introduction to the satellite role in the 5G ecosystem and the SaT5G project, the book chapter addresses the selected satellite use cases for eMBB by presenting their relevance to the key research pillars, their relevance to key 5G PPP KPIs, their relevance to the 3GPP SA1 SMARTER use case families, their relevance to key 5G market verticals, and their market size assessment. The book chapter then continues by providing a qualitative high-level description of multiple scenarios associated to each of the four selected satellite use cases for eMBB. Useful conclusions are drawn at the end of the book chapter.