Missionaries are individuals who are sent to promote their religious beliefs and practices in different communities or countries. They often work to spread the teachings of their faith, provide education, and offer humanitarian aid. Many missionaries belong to specific religious organizations, such as Christianity, Islam, or Buddhism, and they may travel to various regions to share their beliefs. The work of missionaries can include building schools, hospitals, and churches, as well as engaging in community service. They often focus on helping those in need, addressing issues like poverty and health care, while also sharing their spiritual messages with others.