Freesby, signal repeat means that the signal gets repeated. In your example you have signal repetition at 2, which means one signal gets raised 2 times more after the first one. Therefore, when Fisher crosses and raises the first signal for bar "n", there's going to be a signal at bar n+1 and bar n+2.

Theoretical advantage is widening the operation window of logic. It is especially useful and usable for conditions, which occur more rarely, like crossovers, for example. So, the user can add a little bit of "play" into logic, everything does not have to happen in the same bar, one can define a window of multiple bars for signals to be raised.