Track and trace is like a game of tag. A company or organisation sends a package from one place to another and puts a special "tag" on it. The tag is like a special code that can be followed from place to place as the package travels. It's like when you play tag and you take turns being "it" and chasing each other. The tag changes as the package is passed from one place to the next until it reaches its destination. If you want to follow the journey of your package you can use the tag to track and follow its progress.