Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered. Romans 8:26 KJV
Speaking in other tongues is speaking mysteries to God while giving Him honor, praise, and worship. It takes you into a whole new dimension of prayer and releases power from on high.
For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries. 1 Corinthians 14:2 KJV
Speaking in tongues builds up, or energizes, the speaking believer.
But ye, beloved, building up yourselves on your most holy faith, praying in the Holy Ghost, Jude 1:20 KJV
This gift, and every God given gift, is for every believer to benefit.
But the manifestation of the Spirit is given to every man to profit withal. 1 Corinthians 12:7 KJV
It’s time for the body of Christ to receive the Baptism in the Holy Spirit with the evidence of speaking in other tongues.
I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire: Matthew 3:11 KJV
Oh yes the holy fire of God comes with it.