The document provides an overview of open science and its benefits. It discusses how open science involves making research outputs like publications and data openly accessible and reusable. Open access to publications and data sharing are required by Horizon 2020, the EU research funding program. It must be ensured that publications resulting from Horizon 2020 funding are made openly accessible within 6 months, and data must be deposited in repositories to validate results. Overall open science is aimed at increasing the benefits and impacts of research.