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I have couple questions about the no cloning theorm. It states that a quantum state can't be precisely copied.

1-Can you explain to me in very simple words why this theorm violat the uncertainty principle?

2-Also when I read the prove of the theorm, I couldn't understand some of the bra-ket manipultations used to prove this theorm like, when a state is copied we can represent that like:-

G--> |G> |G> two ket product!!

bra and ket can be maltiplied since in matrices one is a coulumn and the other is a row and moreover I know how to represent them as an integeral. But ket with ket product make no sense for me both as an integral or in matrix representation.