soccer officiating

[Foulplay]

"A Referee shall allow play to continue when the team against which an offence has been committed will benefit from such an advantage."

Example :If your tripped while moving the ball up the field and you remain/regain your balance with control of the ball and the referee sees that it is in your best interest to let play continue.. because he/she thinks you will benefit from the situation (i.e better attacking opportunity) he/she will yell "advantage" and let play continue...
But....if within a few seconds an advantage does not materialize the referee will stop play and award the free kick.
There are many theories on applying this rule so I think this is one of the last things in soccer a new referee needs to worry about.