The Vatican's Dicastery for the Doctrine of the Faith explains the pastoral meaning of blessings.
"Blessings are among the most widespread and evolving sacramentals. Indeed, they lead us to grasp God’s presence in all the events of life and remind us that, even in the use of created things, human beings are invited to seek God, to love him, and to serve him faithfully. For this reason, blessings have as their recipients: people; objects of worship and devotion; sacred images; places of life, of work, and suffering; the fruits of the earth and human toil; and all created realities that refer back to the Creator, praising and blessing him by their beauty." (FS8)