We exalt and glorify Jesus Christ as the "King of kings, and the Lord of Lords".
So for the Church to confer onto Mary the title of "Queen" is certainly fitting, since at the Visitation, Elizabeth called Mary "mother of my Lord", and hence, she is also mother of the King.
Indeed, from the earliest Church traditions, Mary has been given the title "Queen" and subsequently "Queen of Heaven", and from that title there are other expressions of her queenship.
The feast is a follow-up to the Assumption and is now celebrated on the octave day of that feast.
God assumed Mary into heaven, body and soul, and in doing so, He bestowed upon her the queenship of all creation, after Jesus Christ who is the King of all creation.
As Jesus exercised his kingship on earth by serving His Father and saving us, so did Mary exercise her queenship by praying for us.
As the glorified Jesus remains with us as our king till the end of time, so does Mary, who was assumed into heaven and crowned queen of heaven and earth and she continues to be the mother of the Church.
So as the Church celebrates the queenship of Mary, let us remember what she told the servants at the wedding at Cana - "Do whatever He tells you" (Jn 2:5)
But in order to do what Jesus is telling us, we have to have the spiritual sensitivity of Mary who knows what the will of God is for her and submits herself to it.
Let us consecrate ourselves to her Immaculate Heart and unite ourselves in a devotion to her, be it the praying of the Rosary of other forms of Marian devotion.
And like Mary our Mother, we too will say with her: Let it be done unto me according to Your Word.