Revelation 14 tells of three important messages to the world. John’s vision here is not symbolic of three literal angels who will come and proclaim these messages to the world. Rather, it refers to God’s people—His ambassadors—who proclaim these truths.
The Three Angels’ Messages are the final messages of warning to the world. These messages ensure that everyone has had a chance to choose between the Kingdom of God and the kingdom of Earth—Satan’s kingdom. When the messages have reached everyone, the time of probation will close and Christ will return to free His people.