The social wellbeing of the people and communities of Wales is a priority for Welsh Government and public services across Wales. The Covid-19 pandemic presented significant challenges for social inclusion, exacerbating inequalities in poor mental health, loneliness, and unwanted social isolation. However, it also showed the agility and innovation of communities to tackle social exclusion and improve wellbeing. The challenge for governments and public services at all levels going forward is how community activity can be sustained and enhanced for the benefit of all. The Loneliness and Connected Communities programme seeks to provide evidence on social disparities and inequalities in the experience of loneliness, as well as what works to improve social wellbeing through collaborative community action and the mobilisation of physical and digital infrastructure and resources.