Among sacramentals, blessings (of persons, meals, objects, and places) come first. Every blessing praises God and prays for his gifts. In Christ, Christians are blessed by God the Father "with every spiritual blessing." This is why the Church imparts blessings by invoking the name of Jesus, usually while making the holy sign of the cross of Christ. (Catechism of the Catholic Church #1671
Certain blessings have a lasting importance because they consecrate persons to God, or reserve objects and places for liturgical use. Among those blessings which are intended for persons -- not to be confused with sacramental ordination -- are the blessing of the abbot or abbess of a monastery, the consecration of virgins and widows, the rite of religious profession and the blessing of certain ministries of the Church (readers, acolytes, catechists, etc.). The dedication or blessing of a church or an altar, the blessing of holy oils, vessels, and vestments, bells, etc., can be mentioned as examples of blessings that concern objects. (Catechism of the Catholic Church #1672
More information on blessings
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