More headroom can make a world of difference. If you have low branches on the crown of your tree, they can interfere with tall people, animals or machinery and vehicles. In this case, lifting the crown is often all that is needed.
Crown lifting involves the removal of the lower branches of the tree to lift the height of the crown.
This can be a better solution than crown reduction on occasions, as it can open up the lower area to allow more light through at the same time as gaining valuable headroom.