They can come in any color you need, and with as little or as much detail as you need (so they can range from having actual faces to just circles for heads). Doesn't matter if your show is dramatic, comedic, Slice of Life, or Super Robot. You can use these people to add to your world, while not drawing away attention from the main characters.
Of course it doesn't always have to be for crowds. You can use them just occasionally for effect, or to show crowds infected by The Virus.
Available in groups of 10, 50, or 500.