It is just a prayer that honors the Virgin Mary and seeks her intercession. The particular timing of when it really is prayed may perhaps differ based upon specific or Neighborhood procedures. The hymn is sung (using the English translation "Hail, Holy Queen enthroned above") by a choir of nuns https://atozbookmark.com/story18325964/how-vita-pro-nobis-can-save-you-time-stress-and-money