Delegation means having an employee do part of the job which you are usually responsible for doing on your own.
Delegation can create trust between you and a deserving employee and he or she may feel that you are giving them a chance to improve their skills and give them some hope that maybe in the future they may be able to do your job in the organization or to do your job in another organization if they chose to leave at some point in the future.
If you yourself also hope to get a position of greater authority in an organization then you will be able to recommend the delegated employee for your position in the organization and gain a satisfied loyal employee and this may be very useful if you need his or her help at some point in the future.
Here is a link to the article in inc.com by Peter Economy which describes nicely the 5 most important things which you should consider when delegating authority.
If you like this evergreen blog read more of them and read one or more of my evergreen books, especially COMMON SENSE.