Greetings,
The Liturgy of the Hours (aka the Divine Office) is the official prayer of the people of God, the Church.
The Liturgy of the Hours is recited by laypeople, consecrated religious, and the clergy.
The Divine Office consists of several readings, psalms, prayer, intercessions, and responses. These prayers are organized into daily hours, which in and of themselves consist of these prayers, responses, psalms, etc.
Clergy are required, to recite the Liturgy of the Hours.
Depending on the National Conference of Bishops, permanent deacons recite only some of the hours of prayer.
Priests and Bishops are required to recite all of the hours.
The LOTH today contain Lauds (morning prayer), daytime prayers, Vespers (evening prayer), and Compline (night prayer).
If you are interested in praying the LOTH I recommend the app iBreviary for apple products. As well as
divineoffice.org
God Bless you, and peace be with you.