Hold'em strategy articles tagged "turn-barrel".
Betting just because you have a draw gives the BB profitable calling opportunities. This article breaks down which draws to barrel in position and which draws to check, using range structure, runouts, and target folds as the main criteria.
On boards where BTN has a large range advantage, even underpairs can become good barrel candidates. The key is to consider the value of the hands you fold out, blockers, and redraws together.