The current landscape, marked by significant global challenges such as climate change, economic and social inequality, and the depletion of natural resources, demands effective responses and urgent measures, also from the realm of finance. Thus, in this chapter, we will address how finance responds to this global call to action and adapts to the need for transitioning toward a sustainable economic and financial model. This involves providing concrete solutions and committed actions, giving rise to what is commonly known as sustainable finance. The objective of this chapter is to comprehend the essential role of financial decisions in achieving sustainability, as well as the main tools or instruments used in the financial sector to contribute to the transition. To achieve this, various central themes will be developed, organized into subsections, allowing students to discover why sustainable finance is an essential driving force for change. These subsections include the following: context and sustainable finance; fundamentals of sustainable finance; sustainable finance products and instruments, and evaluating the effectiveness of impact measurement methodologies. Finally, a brief recapitulation of the key points of this topic will be conducted, along with the main conclusions, prompting reflection on the impact and future of sustainable finance. Emphasis will be placed on the need to promote greater adoption of sustainable financial practices, with financial education playing an indispensable role.