"Three Billion" refers to the estimated number of people living in extreme poverty worldwide, often defined as living on less than $1.90 a day. This figure highlights the significant global challenge of poverty and the need for sustainable development efforts to improve living conditions. Efforts to address this issue involve various organizations, including the United Nations and World Bank, which aim to reduce poverty through initiatives focused on education, healthcare, and economic growth. Achieving the goal of eradicating extreme poverty is crucial for fostering global stability and improving the quality of life for millions.