Why meditate on Om
It is well-substantiated that sound vibration significantly impacts a person’s physical, emotional, and mental state. By chanting Om, we can align our frequency with that of the original universal frequency, which is essential in spiritual practice. As an iron rod becomes as hot as fire when it comes in contact with its flames, a person can spiritualize their life by staying in contact with the spiritual energy of the Absolute.
From: https://www.hinduamerican.org/blog/5-things-to-know-about-om