Why should you keep to the right as much as possible?

What does this rule or driving tip mean?The basic position for drivers is to keep as far to the right as possible on the road. You may temporarily choose a different position to safely overtake, get into the correct lane in good time, or pass an obstacle, but after that you should return to the right as soon as it is safe to do so.How to apply this safelyLook far ahead to check whether the right-hand lane remains clear.Check your mirrors and blind spot before moving back.Don’t keep driving in the middle or left lane unnecessarily.Driving lesson and exam tipAn examiner will look for a logical position on the road. Don’t force yourself back to the right, but do show that after every manoeuvre you consciously return.Remember: keep to the right as much as possible and return safely after overtaking or getting into position.View the source: RVV 1990, article 3.