It's supposed to mean it's setup for a SWAT member or FBI or ATF officer doing a raid.
But it's all a bunch of hooey.
Basically, the larger pistols, with the longest barrels, will come 2 ways, match or competition and tactical.
match means it has really good sights and a special trigger for accuracy and possibly a mag well for faster reloads.
Tactical means it has an accessory rail for a flashlight and usually night sites. And it's usually all black.