The mythology website, www.pantheon.org/mythica.html says Mut was worshipped as the mother of mothers and was particularly venerated at Thebes and Luxor.
The website http://www.godchecker.com/ adds:
"She did her best to amalgamate all the great Goddesses into her own identity and liked to be known as 'Lady of Heaven' or 'Queen of Gods'. Ironically her symbol is that of a vulture. To get noticed in her early days, she helped Isis collect the bits of Osiris and replaced his head and heart. This sort of thing is always a good career move."
The Concise Mythological Dictionary