Youcat commented through CCC – Question n. 275.

YOUCAT Question n. 275 - Is it permissible to venerate relics?

(Youcat answer) The veneration of relics is a natural human need, a way of showing respect and reverence to the persons who are venerated. Relics of saints are properly venerated when the faithful praise God’s work in people who have devoted themselves completely to God.

A deepening through CCC

(CCC 1674) Besides sacramental liturgy and sacramentals, catechesis must take into account the forms of piety and popular devotions among the faithful. The religious sense of the Christian people has always found expression in various forms of piety surrounding the Church's sacramental life, such as the veneration of relics, visits to sanctuaries, pilgrimages, processions, the stations of the cross, religious dances, the rosary, medals (Cf. Council of Nicaea II: DS 601; 603; Council of Trent: DS 1822), etc. 

Reflecting and meditating 

(CCC Comment)

(CCC 2663) In the living tradition of prayer, each Church proposes to its faithful, according to its historic, social, and cultural context, a language for prayer: words, melodies, gestures, iconography. The Magisterium of the Church (Cf. DV 10) has the task of discerning the fidelity of these ways of praying to the tradition of apostolic faith; it is for pastors and catechists to explain their meaning, always in relation to Jesus Christ.   

(The next question is:  What is the purpose of a pilgrimage?)