The clowns are the most ambiguous characters, because they amuse one people to tears, and others to frighten. And the similar fear can seem someone absurd, but do not to this security guard of circus; every night there are terrible clowns who are hunt on people.

5 Nights at Freddy's Clown Nights gameplay

So the security guard's task is not to allow these infernal creations to get into the server room. And for this purpose it is necessary to watch closely movement of the clowns along the corridors, using the tablet and security cameras, and close doors when they approach or turn on the lights. However, you shouldn't abuse it, as similar actions quickly discharge the tablet battery and if it runs out of charge, the security guard will die.