UN agencies are specialized organizations that operate under the umbrella of the United Nations to address various global issues. Each agency focuses on specific areas such as health, education, and humanitarian aid. For example, the World Health Organization (WHO) works to improve public health, while the United Nations Children's Fund (UNICEF) focuses on the welfare of children. These agencies collaborate with governments, non-governmental organizations, and other stakeholders to implement programs and policies. They provide technical assistance, funding, and expertise to help countries achieve their development goals and respond to crises, ensuring a coordinated approach to global challenges.