Evangelicalism is a branch of Christianity that emphasizes the importance of personal faith in Jesus Christ, the authority of the Bible, and the need for sharing the gospel, or good news, with others. Evangelicals believe that everyone should have a personal relationship with God and often focus on themes like salvation, grace, and the transformative power of faith. This movement has roots in the Protestant Reformation and has grown significantly since the 18th century. Evangelicals can be found in many denominations, including Baptists, Methodists, and Pentecostals, and they often engage in community service and missionary work to spread their beliefs.