The rules for rogue state that
Once per turn, you can deal an extra 1d6 damage to one creature you hit with an attack if you have advantage on the attack roll.
You don't need advantage on the attack roll if another enemy of the target is within 5 feet of it, that enemy isn't incapacitated, and you don't have disadvantage on the attack roll.
This is confusing. It says that you need advantage in order to Sneak Attack but then it says you don't. Can someone please rephrase this so it is more understandable?