The Brazilian National System of Cultural Information and Indicators (Sistema Nacional de Informações e Indicadores Cultural - SNIIC) is a convergent and collaborative platform which  unites digital resources meant to aggregate in one single data base the information regarding cultural matters in order to monitor the System's goals and implementation. The aim of this article is to reflect on the concept of memory in its individual, collective and digital instances considering (a) the means that the SNIIC digital platform can offer to promote plural speech, to give voice and visibility to cultural diversity and (b) the role it plays in the construction, preservation and dissemination of memory and cultural heritage. The research methodology used is bibliographic, descriptive and exploratory, concentrating on the thematic approach of Information Science regarding the collaborative web and its effects on culture and social memory. Many challenges and issues regarding individual participation and collaboration arise, as well as on new information flows and preservation of the numerous records of activities and cultural heritage in order to subsidise the construction of individual and social Brazilian memory. It is important to explore, to use effectively, and to publicize the existence of the cultural platform, highlighting its importance and functionalities, stimulating people's participation in the collective building of culture through social appropriation of the cultural information in multiple interaction forms.