This document provides an overview of social impact assessments. It defines social impact assessments as a form of analysis used to strategically measure impacts on social conditions and social outcomes from new or existing developments. The document outlines key objectives of social impact assessments, including making better informed decisions, assessing and resolving conflicts, and empowering and increasing social value for communities. It also discusses stakeholders, variables to assess, frameworks like logic modeling and theories of change, and provides several example social impact assessment reports and guides.