Pointers in C

> Ask the OS for a chunk of memory and use a pointer to work with it. This includes strings and structs.
> Passing large blocks of memory (like large structs) to functions with a pointer so you don't have to pass the whole thing to them.
> Taking the address of a function so you can use it as a dynamic callback.
> Complex scanning of chunks of memory such as converting bytes off a network socket into data structures or parsing files.