The Holy Spirit (or Holy Ghost) is the 3rd person of the Holy Trinity.
The Holy Spirit is God, so he existed, and will exist, for eternity (Psalm 90:2). He was involved in the creation of the universe (Genesis 1:2) and is involved in restraining sin (2 Thessalonians 2:1-12) and saving people (Romans 8:10-11). As of the 1st day of Pentecost after Jesus Christ’s ascension to the 3rd Heaven, the Holy Spirit eternally indwells believers (Acts 2:1-13), sealing them for redemption (Ephesians 1:13-14 and 4:30). As a person, the Holy Spirit works and has a personality. He intercedes for believers (Romans 8:26) and will remove his restraint of evil for the revelation of the antichrist (2 Thessalonians 2:1-12).
Galatians 5:22-23: But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith,
Meekness, temperance: against such there is no law.
Thank you for reading this article. May God bless you with his spirit for eternity.