Okay kiddo, do you know what 9-1-1 is? It's a special phone number that you can call when there's an emergency. In the Philippines, it's the number that you call when you need help from the police, fire department, or ambulance.
So, let's say you're playing in the park and you see someone who is hurt or maybe there's a fire. What do you do? You call 9-1-1! A person on the other end of the phone will answer and ask you what's wrong. You just need to tell them what's happening and where you are as clearly as you can.
The person on the phone will then send the right people to come help you. The police will come if there's a bad guy, the fire department will come if there's a fire, and the ambulance will come if someone is hurt or sick.
Remember, you should only call 9-1-1 in a real emergency when you or someone else is in danger or needs urgent help. Don't call it just to say hi or play jokes because it could take away attention from real emergencies.