Typo refers to you making a mistake while writing, so just saying "Oh sorry i made a typo" or if someone can't understand you, you could say "Oh i meant to say *whatever*, typo", hope it helps!

When you make a typing mistake. Example: I am not sue. Sorry, that was a typo. I am not sure** Usually people also just correct it and put two ** on chats. Example: sue Sure**

A typo can be when you accidentally make a mistake while typing or your keyboard auto-corrects something wrong.

We mostly use it when we make a mistake while typing something.