The ECOSS 30 provides a comprehensive overview of the state-of-the-art in surface physics, chemistry, and material science, focusing on discussions related to the recent advances and current challenges, while pointing out the prospective interdisciplinary development of the field. The ECOSS is organized annually (except when the triennial IUVSTA Vacuum Congress is held in Europe as was the case this year of IVC-19 in Paris) through the joint efforts of the Surface Science Division of IUVSTA and the Surface and Interface Section of the European Physical Society (EPS).