What is the perforation for on the double label paper?

What is the perforation for on the double label paper?

There are a variety of uses. Some are described below:

 Remove the bottom section of the A4 sheet once both labels have been removed as no useful information is printed onto the remaining invoice/packing list area.

 Use 1 of the labels to attach to the package and remove then bottom section (with the second label) to put in with the goods. The second label has a return address, account details or special offer on them.