Hello Helen, 'Keep off' is more likely to be seen on a structure for example an electricity pylon or transformer box, they do not want people climbing on them. 'Keep out' is normally used with regard to a building or land as it is not safe, military or private property. Best wishes Bob

They are not the same. "Keep off" tells you WHAT to do. "Danger" tells you why. For example: I sign could say "Danger. High Voltage. Do not touch." Or a sign could just say "Keep out" because an area is restricted, not because the area is dangerous.

"Keep out!" is a command that tells you what to do. "Danger!" gives you a reason for obeying. If you saw a sign that just said "Keep out!" you might think that it just meant "Private property, no trespassing." If you climb over the fence and go on the property, the owner might not even find out. If he does, he might just yell at you. But if it says "Beware of dog! Keep out!" you know that if you climb the fence, you may be attacked by a guard dog. And if it says "Danger, high voltage! Keep out!" you know you might be electrocuted and killed. "Danger!" is a vague reason, but it's a reason.

"Danger!" is a warning you might be injured if you disobey. "Keep off!" says don't go on something. Here "on" would mean it is supporting your weight. "Keep off!" would usually mean don't walk on a surface, don't sit on something, or don't climb on something. "Keep out!" says don't go in this area. For area with a floor that you aren't supposed to go onto, you might potentially see either. "Keep off!" would be suggesting that you aren't allowed because of the floor / surface. For example, an unstable bridge might have a "Danger! Keep off!" sign. "Keep out!" is suggesting that you aren't allowed because of the area. For example, a military base might have a "Danger! Keep out!" sign.