By definitions, prayer is a request for help as well as a thanks addressed to God or an object of worship. However, biblically ; it is having a conversation with God. A conversation like one would have with any close friend; having a daily relationship with him. However , this takes faith, obedience , patience; as well as having a relationship with God.
But when you pray, go into your room, close the door and pray to your Father, who is unseen. Then your Father, who sees what is done in secret, will reward you."Matthew 6:6 

And if we know that he hears us—whatever we ask; we know that we have what we asked of him. John 5:15

Do you pray to God or to whom? People usually hear the word “pray” and automatically one believes the individual will pray to God. However, did you ever think that people may pray to others as well; such idols or images? This is due to the fact that those they pray to are or were at some point visible . However , God is felt through the spirit.