This book is about the function and use of official statistics. It welcomes the aspiration for official statistics to be an indispensable element in the information system of a democratic society, serving the government, the economy and the public with data about the economic, demographic, social and environmental situation. The book identifies the political role of official statisticians, who decided what gets measured as well as how it is measured. While thousands of official statistics are published every year, and some are quoted by politicians, used by policy-makers or reported in the media, the authors observe that, in the main, official statistics do not feature much in everyday lives of people and businesses. The book concludes with suggestions for more that should be done, especially in the context of improving wellbeing and helping meet the worldwide set of sustainable development goals set for 2030.