As Fr. George W. Kosicki, CSB says; There are different ways to “watch one hour” with the Lord. One of the most
powerful and fruitful ways is to spend an hour in the presence of the Blessed Sacrament. We call this a Holy Hour because it is an hour in the presence of the Holy Eucharist: Christ, Himself, the One who alone is Holy.
There are also different ways to make a Holy Hour: you can pray, alone or with others, before Jesus in the Tabernacle; or you can pray in the presence of the exposed Blessed Sacrament, privately or at a public service led by a priest or deacon.
From Pope Francis on June 3 2018:
Jesus wants to dwell among us. He wants to be part of our lives, to enter your homes and to offer his liberating mercy, his blessing and his consolation. The Lord wants to be close to us. Let us open our doors to him and say:
Come, Lord, and visit us. We welcome you into our hearts, our families and our city. We thank you because you have prepared for us the food of life and a place in your Kingdom. Make us active in preparing your way, joyous in bringing you , who are life, to others, and thus to bring fraternity, justice and peace to our streets. Amen
The Church’s teaching on Adoration of the Holy Eucharist
The Church strongly encourages both private and public devotion toward the Eucharist and teaches that prayer before the Lord sacramentally present in the Eucharist actually “extends the union with Christ which the faithful have received in communion.” It helps them to live in a more Christian way, trying “to maintain in their lives what they have received by faith and by sacraments” ( The Rites of the Catholic Church). During times of public adoration, when the Blessed Sacraments is exposed by a priest or deacon, “there should be prayers, songs, and readings to direct the faithful to the worship of the Lord, to encourage a prayerful spirit. There should be readings from Scripture with a homily or brief exhortation to develop a better understanding of the Eucharistic mystery. It is also desirable for people to respond to the word of God by singing and to spend periods of time in religious silence. Part of the liturgy of the hours may be celebrated to extend the praise and thanksgiving of Holy Mass.
“ The elements of prayer, the Scriptures, praise and silence are all an integral part of
public adoration. All the elements of public adoration should acknowledge the marvelous
presence of Christ in the Sacrament and foster the worship, which is due to Christ in
spirit and truth. Such public adoration of the Blessed Sacrament must clearly express its
relationship to the Mass” (The Rites of the Catholic Church).