Larian Studios Forums Baldur's Gate III Baldur's Gate III - General Things you wish you knew starting out

Advantage… Advantage… Advantage…. Learn how it works. Try to get and maintain advantage as much as possible.

From BG3 Wiki:

Examples of situations that grant Advantage on attack rolls:

Attacking an enemy that is under these conditions: Restrained, Prone, Sleeping, Entangled, Paralysed, Off balance, Enwebbed, Blinded.
Attacking an enemy while being Hidden or invisible.
Armour, Weapons, and Spells that grant advantage