Answer:
It important to keep the name of God hallowed (holy) because of his strong emphasis on purity a stern reminder for us not to misuse his name or do any unholy act which will disregard his name.
This is done in order to show utmost respect to God almighty the creator of the universe and to worship him. This is why he instructed his disciples to say ‘Hallowed be thy name’ in order to sanctify his name during worship acts to him.