Each of the 7 churches finishes with the same message
Revelation 2:7
(7) He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the tree of life, which is in the midst of the paradise of God.
Revelation 2:11
(11) He that hath an ear, let him hear what the Spirit saith unto the churches; He that overcometh shall not be hurt of the second death.
Revelation 2:17
(17) He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the hidden manna, and will give him a white stone, and in the stone a new name written, which no man knoweth saving he that receiveth it.
Revelation 2:26
(26) And he that overcometh, and keepeth my works unto the end, to him will I give power over the nations:
Revelation 3:5
(5) He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels.
Revelation 3:12
(12) Him that overcometh will I make a pillar in the temple of my God, and he shall go no more out: and I will write upon him the name of my God, and the name of the city of my God, which is new Jerusalem, which cometh down out of heaven from my God: and I will write upon him my new name.
Revelation 3:21
(21) To him that overcometh will I grant to sit with me in my throne, even as I also overcame, and am set down with my Father in his throne.
How are we to overcome?
Revelation 12:11
(11) And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.
Is it important?
Revelation 14:9-12
(9) And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive his mark in his forehead, or in his hand,
(10) The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb:
(11) And the smoke of their torment ascendeth up for ever and ever: and they have no rest day nor night, who worship the beast and his image, and whosoever receiveth the mark of his name.
(12) Here is the patience of the saints: here are they that keep the commandments of God, and the faith of Jesus.
So those who keep the commandments will not receive the mark of the beast and the wrath of God while those who do not will.