Vespers is the Evening prayer of the whole church and is prayed in the evening by every priest, religious and some lay people. On Sundays, it is Catholic custom to pray this together in Church. The service comprises of an opening verse, psalms, short reading, prayer and the Magnificat- the song of the Blessed Virgin Mary found in ST Luke’s Gospel.
‘Benediction’ means ‘blessing’ and in this final portion of the service, Our Lord, present in the Blessed Sacrament is exposed for our adoration. After singing hymns of praise, the priest gives us the Benediction with the Blessed Sacrament. We conclude with the seasonal anthem to the Blessed Virgin Mary.
Every Sunday we have Solemn Benediction, chanted in Latin. On most Sundays, Vespers is said according to the Vatican II Liturgy of the Hours. On the last Sunday of the month, all of Vespers and Benediction is chanted in Latin in the form that was universal until Vatican II, the traditional Divine Office.
Here is a sample of the booklets that are used for Vespers. Sunday Vespers
The service is sung by the schola and the clergy so the faithful enjoy an opportunity too meditate on the words provided in Latin and English.
Here is a recording of Solemn Vespers and Benediction at Immaculate Heart.