In chess, pins can be very annoying. They often lead to pieces being lost, or leave players with an unpleasant position where they can't move pieces. However, if the pinning piece is undefended, it is vulnerable to discovered attacks.
For example -
In this game, Lasker played very aggressively through the opening and even sacrificed a piece to take advantage of the pin - and there is no way for black to defend the knight. But there is a problem - white has a nasty discovered attack. See if you can find it:
In the game, Lasker's opponent tried a different discovery -
If you have any good examples of games with similar examples, feel free to put them in the comments. Good luck finding discovered attacks and pins in your games!