The ERO programme is an initiative of ESA and the Euclid Science Team: it includes one day of observations, taken before the start of the nominal survey, to showcase the capabilities of the ESA Euclid mission.Seventeen targets, from galaxy clusters, nearby galaxies, globular clusters, to star-forming regions, have been observed and analyzed. Details on selected ERO projects are available at https://www.cosmos.esa.int/web/euclid/ero-public-release. Original acknowledgement for data: This work has made use of the Early Release Observations (ERO) data from the Euclid mission of the European Space Agency (ESA), 2024, https://doi.org/10.57780/esa-qmocze3