Messaging spam is when you receive unwanted or annoying messages on your phone or computer. It is like when someone keeps bothering you even though you don't want them to. Sometimes they try to sell you something you don't need or ask for your personal information, like your credit card number or password. It is important to be careful with these messages because they can be dangerous and harm your device or steal your information. Just like you don't talk to strangers who offer you candy, you shouldn't respond to messages from unknown people or companies. Always ask your parents or an adult you trust before responding to any strange or suspicious messages.