What's "Advantage" Mean?

Ever hear a ref call "Play On!" or "Advantage!"  Here's what it means.....

Laws of the Game:  Law 5 - The Referee, articulates the authority, powers, duties, and decision-making scope of the referee.

Under the Powers and Duties section of Law 5, one clause states the following: 

"[The referee] allows play to continue when the team against which an offence has been committed will benefit from such an advantage and penalises the original offence if the anticipated advantage does not ensue at that time."

This clause gives the ref discretion to allow play to continue even after a foul has been committed if stopping play would unfairly punish the fouled team.  The idea is that the team which committed the foul should not benefit from the foul.

An example of a situation in which the ref could call "Play On" or "Advantage" might be if the fouled team had a breakaway & might score even after having been fouled.  In this case the ref might call "Play On" to allow the breakaway to succeed.  If it does not, the ref has discretion to halt play and call the penalty on the original offense.