Mooring, also known as moorage, refers to an permanent anchoring system that holds or secures a boat in a certain location.

Usually devices such as secured anchors or heavy cement blocks are located on the sea bed or floor. The anchors or heavy cement blocks are attached to a buoy or a dock by a cable or rope. When a boaters wants to anchor their boat, instead of throwing a sea anchor onto the bottom of the sea floor, they tie off to the mooring. 

Mooring is usually much more reliable than using just a sea anchor. As sea anchor does not protect your boat from drifting or moving in bad weather conditions. Having your boat moored gives a greater chance of your boat not drifting or moving during bad weather conditions. 

Mooring also reduces damage to the bottom of the sea bed or floor.  Continuous anchoring by use of a sea anchor in the same spot creates massive damage to the sea floor. Having your boat moored is not only beneficial to you, but it is also beneficial to the environment.