When used, your pet stops following you and regens health. The health recovered per tick is much higher than when Heel is used. Higher level pets will take longer to recover, simply as there is more HP to regain (it does not mean the regen is slower).
Note that using Stay in battle, your pet will continue to retaliate. You must first use Heel, then stay, for your pet to stop attacking and recover it's health.
This command shares a recast timer with the Heel command.
Can be used to gain distance between you and your pet prior to losing Charm, as to recharm before you're hit by your pet (see Charm#Charm_Duration for details).