It's a prayer that honors the Virgin Mary and seeks her intercession. The particular timing of when it is actually prayed may perhaps change depending on particular person or Group practices. The hymn is sung (utilizing the English translation "Hail, Holy Queen enthroned earlier mentioned") by a choir of nuns https://encapsuladosvip.com/vita-pro-nobis-descubra-os-beneficios-dessa-incrivel-planta-medicinal/