Rooting is the ability to sink and stick while projecting force.

Plant, strike then move, plant/strike/move, plant strike move. repeat

It's this ability to move between states that improves your fighting tactics game.

Boxers work stance, foot drills, sinking and twisting into strikes. Most all fighting arts do. Pretty much any tcma studies this as well because it is part of the study of energies (gings).

TCMA tends to get way down into the weeds of it though and that's quite normal and useful when you think about how long defining martial arts has been going on there. Don't start at the bottom of the weeds though, you will lose your breath!