How does the golden ratio/fibonacci sequence/golden spiral work/connect?

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Are these the same thing? I understand that the sequence adds the previous number to get the next and it approaches Phi, which is the golden ratio (at least I think I have that right.) What exactly IS the golden ratio, in simple terms? How does this connect to the picture of the rectangles with the spiral? It’s easy for me to just google and learn these sort of things but I feel completely lost looking it up lol.

In: Mathematics