What is forward message?

Forward messages are these stupid fake messages that's been passed on to people after people, and usually gets to kids phones or their parents phone and gets them all scared and freaked out. When you get one and it says " You will die if you do not forward this message to everyone on your contacts"Either inmuture teenagers/parents make it up or your phone company because everytime you forward a message it cost money and its just adds up. It's a scam!!!!!!!!