Maun

What are the advantages of Mouna or the vow of silence? 
Should I also observe?

ANSWER: Observe Mouna for a couple of hours daily at any time that suits you. Try to speak little at other times. Avoid unnecessary conversations. Don't talk harsh words and obscene language. Talk sweetly and gently. You must have perfect control over speech. Control over speech means control of mind. The organ of speech, Vak Indriya, is a great distractor of the mind. Mouna gives you peace. It removes anxieties and quarrels. It develops your will power. It conserves energy. It reduces the force of Sankalpa or the thought-current.