It is just a prayer that honors the Virgin Mary and seeks her intercession. The specific timing of when it's prayed may range according to individual or Local community methods. The hymn is sung (using the English translation "Hail, Holy Queen enthroned earlier mentioned") by a choir of nuns while https://encapsuladosvip.com/vita-pro-nobis-descubra-os-beneficios-dessa-incrivel-planta-medicinal/