Knowing how to lock individual chats in WhatsApp is important if you're a security conscious type (which you should be). Let's say your left your new Pixel 8 Pro unlocked on a table while chatting, and some nefarious person picked it up while you weren't looking — if all your chats were unlocked, that person would potentially have access to some sensitive stuff.
Locking the WhatsApp chats you don't want others having access to provides an additional layer of security and gives you some extra peace of mind.
