Cách sử dụng
"Not bad" is a common expression that means something is good or satisfactory. You can use it when someone asks you how something is or when commenting on something that you think is alright. For example, if someone asks you how your day was, and it was okay, you can say "not bad." It's a casual expression that can be used in everyday conversation. Just remember that it doesn't necessarily mean that something is great, just that it's decent or satisfactory.