I didn’t use it in as a defined term, merely reflecting what I used in the context of when you would fire a radar missile unguided at long range to cause the enemy to honour the threat and manoeuvre. Firing for the effect it would have.
Doing a search the artillery term would seem to be “Final Protective Fire”
“A type of a priority target in a defensive situation is a final protective fire (FPF). Final protective fire is an immediately available prearranged barrier of fire designed to impede enemy movement across defensive lines or areas”.
In artillery terms you first have ranging shots to zero in your guns, then “fire for effect” are the subsequent rounds on the target.
e.g. In the movies where the observer instructs the guns “up 100, left 50” then when they’re on target “fire for effect” when they fully open fire. ((Though in UKR they’re probably adjusting their own fire using a drone)