Pickup height adjustment is essential to get the best out of your guitar. If the pickup height is not adjusted correctly the balance in volume between the treble and bass notes can be off and/or the balance between different pickups.
Also if the pickup is too far away from the guitar string the sound can be thin and weak and lack volume.
If the pickup is too close to the guitar strings then the magnets in the pickup can pull on the string putting it out of tune or generating unpleasant wolf tones.
There is no one correct height which will automatically give you the correct adjustments. Use the measurements in my video as a guide and then use your ears for the final adjustment.
In this video I demonstrate electric guitar pickup height adjustment.