The Bible teaches that angels are created, spiritual beings who serve as God's messengers and ministers. They are currently employed by God to watch over and serve the heirs of salvation, acting as witnesses to God's authority and glory.
The Scriptures consistently describe angels as created spiritual beings. They are not divine, but were created by the Father through the Son to serve the Creator. As Hebrews 1:14 declares, they are ministering spirits sent to serve those who will inherit salvation. They are subject to God's providence, and as noted in the Belgic Confession Art.12, they were originally created good to be messengers, though some fell from their original excellence into perdition due to their own wickedness, while others have remained steadfast by the grace of God.
Angels are active agents in the outworking of God's providence, serving as watchers over the Church. While some angels did not keep their own principality and are held in everlasting bonds as described in Jude 1:6, the holy angels continue to execute God's commands. As explained in On the Holy Spirit Ch.13, they are often invoked as witnesses to the truth because they are appointed as tutors and guardians over men. Their ministry points us ultimately to Christ, who is far superior to them, as all angelic service is subordinate to the glory of the Mediator.