Direct mode is like talking to your friend next to you instead of shouting across the room. When you use direct mode, your device, like a phone or computer, communicates directly with another device nearby without using the internet or any other network.
Think of it like having a secret language that only the two of you can understand. When you talk in this language, no one else can hear you, and you have a private conversation.
Direct mode is useful when you are in a place with no internet or when you want to keep your communication private. It's like having your own secret channel, just for you and your friend.