The advantages of Machine Learning/Deep Learning (ML/DL) techniques have been seen in a wide range of applications such as image recognition, traffic prediction, self-driving vehicles, and medical diagnosis. These techniques have also gained popularity within the Earth System Observation and Prediction (ESOP) community due to their ability to improve our understanding and prediction capabilities on the Earth's complex and wide-scale dynamics. Together with the increase in computing power, these techniques are valuable to automatically process and analyse a large scale of available data but they still present some limitations, as an example of DL methods that need large amounts of curated and labelled data. As a consequence, they have become a common language between academia and industry across several Earth Observation sectors. Therefore, one of the goals of the workshop is to share all domain experiences from the recent progress and synergies between ML/DL (combined with conventional tools) for satellite observations, weather and climate models, and post-processed model outputs.