Mercator Ocean international is involved with the development of digital tools to give society at large access to ocean knowledge. We have already developed many ocean models for the Global Ocean and regional seas for the last quarter of a century and the next step will be to develop a Digital Twin of the Ocean, to integrate a wide range of existing and new data sources, to transform data into knowledge and to connect, engage and empower citizens, governments and industries by providing them with capacity to make informed decisions. As the name suggests, we have the technology to create a digital copy of the ocean, on which we can test the effects of climate and disaster scenarios on the ocean climate system as well test the efficacy of mitigation and adaptation plans. With the development of digital interactive high-resolution models of the oceans, the use of all available data, including the latest in situ or satellite Earth observations, in vivo or economic data along with cloud infrastructures and Artificial Intelligence (AI) techniques, the DTO should allow continuous and timely monitoring of the ocean, from the coast to deep sea and from the surface to the seabed.Ocean data from our Physics, Biogeochemistry and Sea Ice Ocean models can be displayed in our viewers such as the Copernicus Marine MyOcean viewer which is available with the Copernicus Marine Service, the Mercator Ocean bulletin and WEkEO Earth viewer. Ocean data digitalisation is also improved through services, programs and partnerships led by Mercator Ocean such as EU4OceanObs, WEkEO and the Copernicus Marine Service.