Mantra repetition meaning

"In general, the mantras are in Sanskrit. Sanskrit is considered not a human language, but a divine one. If we think about it, each language comes from the energy of each country (German is impregnated with German energy, Italian with Italian energy, etc). But Sanskrit came from this other energy, a divine, or enlightened energy. So when you recite the mantras, when you make the sounds of the mantra, for example "Om Tare Tuttare Ture Soha", there is a blessing just in those sounds: the Sanskrit alphabet is a mantra.

Often we want to know the meaning of the mantra, but if we pronounce a translated mantra, we will see that the energy is different. The sound of the mantra creates a vibrational field, since the mantra is an energy. And the energy of saying "Om Mani Padme Hung" is very different from saying "Oh jewel in the lotus."

So, the sounds of the mantras, if you recite them properly:

• They are having an impact on the body.
• You are concentrating on the recitation and the sound of the mantra, therefore it is a mindfulness practice.
• You have the blessings of the lineage, as mantras are passed down through a lineage.

So you have all these factors coming together to make a profit. In fact, they recently did a study to test its benefits and found it to be healing, and also effective in terms of deepening one's awareness and mindfulness."

Lama Tsultrim Allione

From:
https://studybuddhism.com/en/advanced-studies/vajrayana/tantra-theory/mantra-recitation