A baud rate is like a speed limit for how fast we can send information between two devices. Imagine you have a toy car that you want to send down a track and you have a friend on the other end who needs to catch it. The speed limit for the car is how fast you can send it down the track before your friend can't catch it anymore.
When we talk about a baud rate, we're talking about how many times we can send a signal in one second. It's like how many toy cars you can send down the track in one second. This is really important because if we try to send information too fast, it might not be accurate and your friend won't be able to catch the car.
So, a baud rate helps us make sure that we're sending information accurately and that it's not getting jumbled up. It's like a traffic light that helps us make sure the information we're sending doesn't crash into other information.