Angels are heavenly servants to God, equipped and eager to fulfill any instruction the Lord gives to them (Psalm 103:20–21). The Holy Spirit instructs the church in Hebrews 1:14 that angels are “all ministering spirits sent out to serve for the sake of those who are to inherit salvation.” The three angels in Revelation 14:6–11 speak to all who dwell on Earth but the primary beneficiaries of what they need to say are the saints, as Revelation 14:12 makes clear.
6 Then I saw another angel flying directly overhead, with an eternal gospel to proclaim to those who dwell on earth, to every nation and tribe and language and people.