The Knowledge Development and Exchange Hub (KDE Hub) is dedicated to optimal mental health and its promotion for diverse populations across Canada. We support projects funded through national programs that also support the KDE Hub. We also engage others with shared interests in developing and scaling promising approaches for mental health promotion. The Hub helps to create, share and use a wide range of knowledge that is relevant, credible and timely. We do this through collaborative studies, curating knowledge, developing resources to fill gaps, facilitating meaningful connections and dialogue, and contributing to collective actions.