Mantras are basically prayers which are articulated loudly with proper sound and rhythm and are chanted repeatedly.
What is Mantra ?
These are Sanskrit words which have power and are used as invocations. There is power and dynamism in the mantra, which must be uttered with proper attention to rhythm and sound to establish resonance. Some mantras are to be uttered mentally, quietly and most particularly the Om Mantra.
“Man” means the soul or mind and ‘tra’ means to protect or guide, thus it is the guide of the soul or protector of mind. Mantras like OM also assist in awakening the spiritual forces in the devotee.