If you Believe God is,,, you will believe that God is a God.. Meaning you will believe that God knows Every thought that has ever been thought by all peoples throughout all time..
Prayers are thoughts sometimes expressed verbally, are they not?
Now if you don't believe that God knows all thoughts that have ever or will ever be thought, then you really don't believe in a God do you? You might look upon God as a way superior Being a kind of super brain with a lot of power but a lot of people think aliens from other worlds are like that and they are not Gods if they exist are they?
Actually believing that a God actually exists is key to believing all the other miraculous claims in the Bible.. All the miracles revealed in the Bible is Easy Peasy for an Actual God.. But for those who do not believe in God things like the Virgin Birth are impossible and things that are only worthy to be mocked..
@lonewolflegends Then if you have Faith in the Christian God, The Holy Bible answers the questions that you have on prayer. Jesus even helps everyone with a model prayer.