This report provides extensive information designed to guide civil society through the changes that algorithms are bringing in our daily lives. It explores the role of algorithms in the household, the workplace and marketplace. The guide presents in simple terms various useful applications of algorithms and discusses the value of citizens' data in algorithm-driven markets. Finally, it highlights legal challenges and risks with particular regard to equity, privacy, cyber-security and also competition law. Outlining the relevant legal issues and debates around algorithmic control, fairness and accountability, this report hopes to play an informative and hopefully empowering role to members of civil society.