I think that the pointer is a memory address where a data is found, that is, as a direct access to a folder in Windows.
It is better to create a shortcut to a data, to copy that data several times, in addition to being much faster.
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Spot on! A pointer is a way to access memory with out actually messing around with the original object. It allows for easier data access but be careful because you can lose control of what you are pointing to and could lead to memory leaks.