Prayer is one way we communicate with God. While our omniscient God knows us inside and out (because He created us) He invites us to talk to Him through prayer so that we can know Him better, grow in faith and be always open to how He is working in our lives and the lives of those around us.
1 Thessalonians 5:16-18 says, “Rejoice always, pray continually, give thanks in all circumstances; for this is God’s will for you in Christ Jesus.”