An automatic lubricator is like a little robot that helps machines stay healthy by keeping them oiled up. Just like how we sometimes put oil on our bike chain so it doesn't make noise and run smoothly, machines need the same thing so they can work well too.
The lubricator is kind of like a tiny tank that has oil in it. It is attached to the machine and has a tube that goes into where the machine needs the oil. When the machine starts working, the lubricator pumps a little bit of oil through the tube and into the machine's parts that need it. This helps the machine run smoothly and quietly, and it also helps it last longer because the parts won't wear out as quickly.
So, the automatic lubricator is like a little friend that helps machines stay healthy by giving them oil when they need it.