For Latter-day Saints the statue of the angel Moroni on top of temples symbolizes the restoration of the gospel in these latter days.
Symbol of the preaching of the restoration of the gospel
Moroni represents the angel in John’s vision in the New Testament: “And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people” (Revelation 14:6).
It is fitting that Moroni embodies that Biblical messenger since it was he who led the prophet Joseph Smith to the golden plates which Joseph translated and published as the Book of Mormon, another witness of Jesus Christ.
Symbol of the heralding of the Second Coming
Furthermore, the angel Moroni is also a herald of the Second Coming: “for the Son of Man shall bcome, and he shall send his angels before him with the great sound of a trumpet, and they shall gather together the remainder of his elect from the four winds” (Joseph Smith-Matthew 1:37).