The Presentation of Mary in the Temple pertains to tradition and is not in Scripture.
This tradition has great symbolic value, because as she became the Mother of Jesus, the Virgin Mary truly became the Temple of the Divine Presence, the new Tent of Meeting.
This tradition has great spiritual value since it expresses that the Virgin Mary grew up praying, in preparation to become the mother of the Lord.
This tradition offers a model for all who are consecrated to God: not only all religious and priests, but all baptized Christians as well, since we are all called to consecrate ourselves to the Lord, i.e. to make of our lives a pleasant offering to Him and to become the living stones of the spiritual Temple.