Why or when to use const on pointers? TFS 1.2

[gudan garam]

Hey, so I have a simple question

that is when or why to use, for example

const Tile* playerTile = player->getTile();

instead of

Tile* playerTile = player->getTile();

 

[Printer]

Well this is a better explantion than i would provide:
The C++ 'const' Declaration: Why & How

 

[gudan garam]

So, basically its a way to instead of copying the whole object which would cost memory, we get a reference to it and to not be able to change it, use const?