RecSys brings together the major international research groups working on recommender systems, along with many of the world’s leading companies active in e-commerce and other adjacent domains. It has become the most important annual conference for the presentation and discussion of recommender systems research. In recognition of the role of the conference in bringing the recommender systems community together, the theme of RecSys 2021 will be “A place to meet and exchange” and the conference venue will be the Amsterdam Stock Exchange Building, which has been transformed into the Amsterdam Conference Centre.