A planing hull generates dynamic lift at speed so the boat rides on top of the water instead of displacing it, which is what lets a tender or chase boat reach 30 knots and beyond. It is the dominant hull form across the superyacht-tender world.
The trade-off is ride: a planing hull pounds in a head sea where a displacement hull would push through it. Deadrise is the angle that tunes that ride. See the tenders pillar.