A hierarchial naming system for computer systems, services or for that matter any resource participating in the INTERNET. Various information with domain names is assigned to each of the participants. DNS translates the names of domain into meaningful to humans into binary IDENTIFIERS that are ASSOCIATED with the equipment of network to locate and address these DEVICES. 
Advantages:
More Reliable: Delivers messages to the users with zero downtime.
Faster: DNS are connected WELL at intersections of internet. Any cast technology enables requests are answered to the next closest node in the case of maintenance or downtime.
Smarter: Automatic corrections of types.

A hierarchial naming system for computer systems, services or for that matter any resource participating in the internet. Various information with domain names is assigned to each of the participants. DNS translates the names of domain into meaningful to humans into binary identifiers that are associated with the equipment of network to locate and address these devices. 
Advantages:
More Reliable: Delivers messages to the users with zero downtime.
Faster: DNS are connected well at intersections of internet. Any cast technology enables requests are answered to the next closest node in the case of maintenance or downtime.
Smarter: Automatic corrections of types.