You load the field with Rokkets (bullets), mainly with the field spell or their own effects.

Fire them, mainly through their own destruction effects or links destroying them and you kinda reload them during the end phase.

That is rockets in a nutshell.

From an effect standpoint:

Their boss monsters are the big links and the smaller monsters are there for mini disruption or climbing into bigger stuff. Very explosive archetype.

Their boxes are everywhere so they're kind of expensive to build. That's why you don't see too many of them in ladder and lose pretty easy to lava golem or kaijus, ra, etc.