We come together touching and agreeing in prayer to God. Power in the group of the believers in Christ stirs up the spirit God.
Acts 2:42
And they devoted themselves to the apostles' teaching and the fellowship, to the breaking of bread and the prayers.
Today people have been busy doing things by themselves. Everyone goes on their way of talking to God in prayer. There is not nothing wrong with this, but when people come together as a body of baptized in Christ prays; things get done. Yes, I know God hears the prayer of each person who prays, but the power of the group can be a wonderful experience.