So you know how sometimes when you are in a noisy place and you can't hear what someone is saying, you look at their mouth to try to figure out what words they are saying? That's kind of like what lip reading is.
Lip reading is when people look at someone's mouth to try to figure out what they are saying, especially if they can't hear well or at all. People who are deaf or hard-of-hearing (which means they can't hear well) often use lip reading to understand what people are saying.
But it's not just about looking at the mouth - people who lip read also pay attention to facial expressions and body language to help them understand what people are saying. They might also use other clues, like knowing the context of the conversation or picking up on certain sounds.
Lip reading can be really helpful for some people, but it can also be pretty challenging because not everyone speaks in a way that is easy to lip read. Some people might speak really fast, mumble their words, or cover their mouths while they're talking, which can make it harder for someone to understand what they're saying.