According to the Catechism, "Pilgrimages evoke our earthly journey toward heaven and are traditionally very special occasions for renewal in prayer. For pilgrims seeking living water, shrines are special places for living the forms of Christian prayer "in Church.'" (CCC 2691)
The Jubilee calls us to set out on a personal journey of conversion, to reconcile with God, and pilgrimages are a beautiful tool in the Church to facilitate just that. When we travel, we not only change location, but we ourselves change.