You speak a command that is either a sentance or a word to a creature you can see within range. The target must succeed on a Wisdom saving throw or follow the command on its next turn. The spell has no effect if the target is undead or if it doesn't understand your language.

At Higher Levels. When you cast this spell using a spell slot of 9th level, you can affect one additional creature for each slot. The creatures must be within 30 feet of each other when you target them.