PDF417 is a type of barcode that is used to store information about things or people. It looks like a bunch of black and white lines and squares. To use it, you take a picture of the barcode with a special kind of camera called a barcode scanner. The barcode scanner reads the barcode and then shows the information it contains. PDF417 barcodes can store lots of different kinds of information such as names, addresses, and even whole documents. This makes them very useful for things such as tracking packages, scanning tickets, and keeping personal information secure.