This document discusses the origins and types of "e-friction" that constrain the growth of the digital economy. It identifies four main types of e-friction: infrastructure-related, industry-related, individual-related, and information-related. Infrastructure friction includes issues like lack of access and high costs that limit basic online access and activity. Industry friction involves shortages of skills, capital, and other factors that inhibit successful online business. Individual friction affects consumer engagement online through issues like insecure payment systems and data privacy. Information friction covers obstacles to accessing online content. Reducing these sources of friction could significantly boost economic growth by greasing the wheels of online commerce and interaction.