1. Proves Jesus is the Son of God. The resurrection was the means by which God declared Jesus to be His Son. "Concerning His Son Jesus Christ our Lord, who was born of the seed of David according to the flesh, and declared to be the Son of God with power according to the Spirit of holiness, by the resurrection from the dead" (Rom. 1:3-4).
2. Validates Our Faith. In 1 Corinthians 15:12-19, Paul indicated that there are some consequences to our faith if Jesus did not rise from the dead: the preaching of the apostles is vain (v. 14), our faith is vain (v. 14), the apostles were false witnesses (v. 15), we are still in our sins (v. 17), the dead have perished without hope of a resurrection (v. 18), Christians are the most pitiable of all people upon the earth (v. 19).
3. Assures Us of Future Judgment. The resurrection of Jesus from the dead is the assurance of our own resurrection - to be followed by judgment. "Truly, these times of ignorance God overlooked, but now commands all men everywhere to repent, because He has appointed a day on which He will judge the world in righteousness by the Man whom He has ordained. He has given assurance of this to all by raising Him from the dead" (Acts 17:30-31).
Christianity stands or falls with the resurrection. Either Jesus rose from the dead like He said He would, proving Himself to be the Son of God and gaining victory over death, or He did not rise from the dead, proving to be the greatest hoax the world has ever known. There is no middle ground.
If you believe that Jesus died and rose from the dead, why not act upon that belief right now by repenting of your sins, confessing your faith in Him and being baptized in water for the remission of your sins!