Stagger leads to increased damage and a finisher attack

As you and your enemies tussle in The Veilguard, you’ll notice they have a stagger bar above their life bar. Focusing on an enemy and hitting them with a barrage of attacks will put them into a staggered state once this bar fills, which will open them up to greater damage or a takedown finishing move. This can be increased by inflicting status effects like the Overwhelmed debuff via Davrin’s Heroic Strike attack.