From steering decision making in times of complexity to stewarding cross-cutting policies and guiding good practices across the public administration, centres of government (CoGs) play an important role in achieving government ambitions. This compendium gathers and shares practices and experiences of CoGs in undertaking their various roles and functions. It describes the mechanisms CoGs use in roles such as bridging the political-administrative interface, stewarding cross-cutting policies, guiding public administration reform, and engaging with citizens and other stakeholders.