This chapter introduces the UN SDGs within the context of environment, social, and governance (ESG), and sustainability. It also provides a brief history of the SDG agenda. Understanding sustainability and the SDGs is essential because these frameworks provide a road map for addressing the world’s most pressing challenges. The SDGs encompass interconnected objectives that aim to eradicate poverty, reduce inequality, promote health and education, protect the planet, and foster economic growth, ensuring no one is left behind. Understanding the SDGs empowers stakeholders to identify gaps, drive innovation, and implement impactful and scalable solutions. It allows businesses to align operations with sustainable practices, enhancing their competitiveness and reputation while contributing to global progress. For individuals, it fosters a sense of responsibility and encourages sustainable lifestyles. At the policy level, understanding the SDGs helps governments prioritise resource allocation and international collaboration. More significantly, it is essential to comprehend and solve the challenges delaying SDG achievement while lessons and best practices are harvested and shared worldwide. On a planet increasingly threatened by climate change, resource depletion, and social inequality, a comprehensive understanding of sustainability and the SDGs is essential to foster cooperation, drive meaningful action, and ensure a sustainable and just future for all.