Nagle's algorithm is like a teacher who waits and collects a bunch of homework before grading it all together.
When you send a message (or "packet") over the internet, your computer may split it into smaller parts to make it easier to send. Nagle's algorithm waits until these small parts are all sent before asking for a response. This way, if an error occurs during transmission, the entire message doesn't need to be sent again.
Think of it like putting puzzle pieces in an envelope. Instead of sending each piece individually, you put them all in one envelope before sending. That way, if one piece falls out or gets lost, you can resend the entire envelope, and not just a single piece.
Nagle's algorithm helps to reduce network congestion and improve efficiency by reducing the number of messages that need to be sent.