In the present document, written by and based on WP1’s data analysis and literature collection, and on the reflections collected through the collective debates on the maximisation of the impact of digitisation of cultural heritage that have characterised the entire inDICEs path, the following contents are present: - An overall description of the ecosystem that embraces the different research designs conducted by WP1 (as described in D1.3, D1,4 and D1.5) on the most important digital open platforms, tracing a fil rouge that clearly and coherently defines the context of the discourse, the theoretical approach, and the main trends in terms of digital creative production cultural participation both in general and in relation with the heritage and cultural institutes - Conditions that have to be considered for navigating and relying on the digital realm as a Cultural Heritage Institution (CHI) or as a cultural practitioner or policy maker, such as the dynamics of the attention economy; the open platforms community engagement mechanisms; the role of social skills and capabilities for creating platforms of collective intelligence - a wide literature and best practices review on the importance of cultural active participation in the digital sphere and the 8 Impact Areas framework, regarding the maximisation of the impact of digitisation of cultural heritage - Highlights supporting the “inDICEs policy brief: Towards community-driven digital cultural heritage with a purpose” (“inDICEs policy brief”), where we advise CHIs and their professionals of the importance of learning, implementing and measuring the knowledge and practices proposed.