Sleep features, which work during Standby, Hibernate, and Shut Down mode, make sure the laptop isn't just sitting there when your customer isn't typing on it.
Sleep & Music
In a laptop with this feature, your customer can use the laptop speakers as the speakers for their portable media player, smart phone, or other audio source.
The benefits are:
USB Sleep & Charge
You can tell if a laptop has this feature because it will have a lightning bolt graphic next to one or more USB ports.
The benefit is that your customer can use the laptop USB port to recharge a USB powered device without turning on the laptop. That means they don't need to travel with a power brick to recharge most USB powered smart phones, portable media players, and even many video cameras. Again, they save space in their luggage.