Sometimes we are ignorant of what kind of prayer or the exact words we should pray. But the Spirit helps us to pray. The best Bible verse for this is Romans 8:26 Likewise the Spirit also helps in our weaknesses. For we do not know what we should pray for as we ought, but the Spirit Himself makes intercession for us with groanings which cannot be uttered. Sometimes prayers are just feelings with no words or it’s hard to figure out what the words need to be. So the Spirit helps us to pray because we are weak and do not know what to pray. So let the Spirit help us pray.
The next verse tells us that His prayer is according to the will of God. Romans 8:27 He who searches the hearts knows what is the mind of the Spirit, because He makes intercession for the saints according to the will of God.
then verse 29 tells us what is the will of God, that is that we would be confirmed to the image of Christ. Romans 8:29 For whom He foreknew, He predestined to be conformed to the image of His Son, that He would be the firstborn among many brethren.