Billy Graham was an American evangelist and prominent Christian figure who rose to prominence in the mid-20th century. He founded the Billy Graham Evangelistic Association and held large-scale preaching campaigns around the world, reaching millions with his message of spiritual revival and salvation. Graham's charismatic presence and straightforward preaching style made him one of the most influential evangelical preachers globally, earning him the title 'America's Pastor.' His legacy includes advising several U.S. presidents and playing a significant role in shaping modern evangelicalism.