Answer 1

nothing. In Python they both do the same thing as far as writing a simple string, although one will allow the print function to contain a " " inside of it.

name='Yuki'
name="Yuki"

Those are both the same. To print a statement that contains a quote mark, you can use the other type inside of your string.

print('I am "The Greatest" in the world')

This would output:

I am "The Greatest" in the world

That said, this is a Python thing. When you move on to other languages, ' ' is used for Chars and " " is used for strings. as such it is a good habit to get into. Stick to " " for your strings