When you use Shield Wall, your movement is not slowed as much. You also protect nearby allies by giving them improved armor.
||Weapon and Shield
Shield Wall unlock
Chevalier's Step is a Warrior ability from the Weapon and Shield Tree in Dragon Age: Inquisition.
About Chevalier's Step
Chevalier's Step is an upgrade to Shield Wall which reduces how much your movement is slowed, as well as giving allies within range improved armor.
Notes and Tips
Weapon and Shield Ability Tree