This document provides an overview and introduction to sustainability reporting guidelines. It discusses the purpose of sustainability reporting as measuring and disclosing an organization's economic, environmental, and social performance and impacts. It outlines the Global Reporting Initiative's framework for sustainability reporting, which was developed through a multi-stakeholder process to provide a consistent standard for organizations to report on their sustainability performance and impacts. The guidelines are intended to help organizations identify important disclosures around their strategy, profile, management approaches, and performance indicators relating to economic, environmental, and social topics to provide a balanced representation of their sustainability performance.