The deliverable "D10.3 Report on Coordination, Prioritization, and Harmonisation in the Solid Earth Subdomain," primarily focuses on the strategic prioritization of activities aimed at enhancing the application of FAIR (Findability, Accessibility, Interoperability, and Reusability) principles across various Earth Science disciplines in WP10. This document provides an overview of the selected activities, explaining their prioritization based on the gap analysis and need for improvement in FAIRness. The report reflects upon the efforts of the European Plate Observing System community in embedding FAIR principles from the outset and further improving its commitment through these prioritized activities. Key initiatives include the harmonisation of metadata, implementation of Persistent Identifier systems, data and metadata lifecycle management, and the development of common vocabularies across multiple Earth Science domains. The success of these activities highlights the importance of strategic planning and prioritization in enhancing FAIRness and overall data management effectiveness in the ENVRI community.