Prayer is communication with God, man speaking to God and God to man.
Jesus prioritize prayers making it the key to his many activities on earth.
There are three levels of prayer- asking, seeking and knocking. As well as many types of prayers : praise and worship, commitment, petition,confession,repentance and intercession.
Jesus taught us how to prayusing the model prayer which introduced these prayer types.. we have to pray to God the Father through the name of Jesus for ourselves and others unceasingly.
When we pray nations, individuals are transformed as well as us too.
All prayers made according to the promises of God will be answered by God. There are hindrances to prayers which include: sin, unforgiving spirits, self righteousness, lack of compassion. If God has given direction, stop praying and obey God. You can combine prayers and fasting to have more efficient results.