I would like to know, why did Allah create the universe, creatures, and this worldly life?

Allah created humankind and jinn to worship Him, and He created worldly things for them to benefit from, to aid them in His obedience, and to reflect upon, as stated in the verses: "And I did not create the jinn and mankind except to worship Me," "It is He who created for you all that is on the earth," "And He has subjected to you all that is in the heavens and all that is on the earth - all from Him," "And the grazing livestock He created for you," "He who made for you the earth a bed and the sky a ceiling and sent down from the sky water and brought forth thereby fruits as provision for you," "And it is He who made for you the stars that you may be guided by them." Surah An-Nahl also clarifies many of the blessings subjected to us.