Range advantage
When one entire range dominates the other on a given board
Definition
Having the range advantage means your ENTIRE range has more equity than your opponent's on a given board — not your hand, your range. It's distinct from the nut advantage: holding more of the strongest combinations (sets, two pairs, overpairs). You can have one without the other, and they don't drive the same decisions. The canonical example: BTN opens, BB defends, flop A-K-7 rainbow. The BB 3-bet most of her AA, KK and AK preflop — her calling range holds few of them. The opener has them all, plus every dominating Ax and Kx: he holds both advantages and can c-bet nearly his whole range for a small sizing. Conversely, a 6-5-4 board connects far better with the BB's defense than with a UTG open. In practice: the range advantage determines WHO bets and how often; the nut advantage determines who can bet BIG (overbets belong to the side holding the nuts). And everything gets re-evaluated on each street — a turn card can hand either advantage to the other side.
UTG opens, BB defends. Flop K♦Q♥3♠: clear edge to the opener — all the AK, KK, QQ, AA are in his range. Flop 6♥5♥4♠: the balance flips — the BB, defending 87s, 75s, 65s or 54s, holds far more straights and two pairs than the opener: she owns the nut advantage, and the opener's overpairs must proceed carefully.