108 is a special phone number you can call when you are in trouble and need help. When you call 108, there are special people called operators who will answer the phone. They will ask you questions to find out what kind of help you need. It could be if someone is hurt, there is a fire, or if you need help from the police. Once the operator knows what kind of help you need, they will send the right people to come and help you as soon as possible. Always remember that you should only call 108 in case of an emergency when you need immediate help.