Blessed is the name of His Majesty.

First, it's not a concept but a sentence. What you mean is that you don't understand the sentence. I assume that the difficulty with the sentence is mainly the concept "name of the glory of his kingdom" that appears in it. Simply put, it seems to me that the intention is a name that describes the glory of God's kingdom. God's names (especially in Kabbalah) refer not to Him Himself but to His enthronement (its derivatives, its expansions, roughly). God's kingdom is the bottom of the world of enthronement (kingdom is the last, lowest sphere), and its glory is what surrounds it, that is, what it overlaps with. The worlds of the universe (the created worlds, us). The name of the glory of God's kingdom is His name as it appears (=His glory) in our worlds. The word "Baruch" is explained in detail in the Rashba's reply that discusses the meaning of blessings. Simply put, this is the secret of the work of a high necessity (in the language of the Rishonim), meaning that we give strength (baruch = abundance, strengthening) to God, and more precisely to His appearance in this world (= the place of His glory and kingdom). And even though He is infinite and exists forever and ever, temporary mortals like us can give Him strength, in the sense of "give strength to God."