The Blessings of Maa Baglamukhi produce a divine protective defend in the form of an aura around someone thus preserving him/her from malefic energies in the form of black magic spells or evil eye. An additional etymology implies that valga suggests "to paralyze" and symbolizes the strength of stambhana, "paralysis" https://www.youtube.com/shorts/5VeSyP9JRw0