Guide to chess for beginners - Forking

A simple yet very strong tactic of chess is to 'fork' an opponents peices, to properly fork you must use any piece and look at where the piece can go without getting captured. Then move that piece so that its putting pressure on two or more pieces that essentally 'forks the opponent'. But me mindful what you fork you'd always want to the advantage out of the opponent not give them the advantage.