The document discusses impact by design in social science research. It defines impact according to the ESRC as having economic and societal benefits, wider social impacts, and effects on government policy. Impact occurs through world-class research, skilled people, infrastructure, international leadership, and partnerships. The document outlines four key elements of impact by design: understanding the user community through stakeholder mapping; engaging the user community early in the research process; building robust, significant, and relevant evidence; and targeted communication through different channels suited to various user groups.