Her Puja (worship) ritual infuses Her protective blessings with the subtle bodies of an individual thus developing a constructive & protecting aura of energies which have been Divine and help it become unattainable for unfavorable energies to permeate. There are many reasons of mantras dependant upon the religious school involved, https://vashikaran22109.bligblogging.com/36237693/beej-mantra-things-to-know-before-you-buy