Salam
Just like the title asks- why do angels exist? What important purpose do they possess? Other than jibraeel's duty to convey revelations or the angels that played part in our testing (harut and marut, the angels that were sent down to Lot) I can't imagine why we needed angels. Do they have a test of their own? But because they can't sin and have direct proof of God, surely they can't be tested. So why did God create them? Just to worship him? Some don't seem to possess a "true" purpose either. I say true purpose because some (as far as my understanding goes) don't seem necessary at a