What does it mean to fear God?
It means obeying His commandments, knowing who is the real Boss on the top of everything. Fearing God means the acknowledgement of His strength, His magnificence, His power, His holiness and therefore, respect and honour Him.
Fear of God is a kind of salubrious fear, not a kind of phobia people needing a psychiatric treatment have. Fearing God we understand that He is going to judge us for our sins and it impacts our deeds.