What is paper with holes on the side?

Paper with holes on the side is commonly known as perforated paper. These holes or perforations are created using a special tool that punches the paper at regular intervals, resulting in evenly spaced and removable sections or sheets. Perforated paper is commonly used for printing invoices, receipts, and other business forms that require easy tearing and separation. It is also used for printing coupons, event tickets, and tear-off portions of flyers or brochures. The paper with holes on the side can come in various sizes and can be made from different materials such as bond paper, cardstock, or synthetic paper. Perforated paper can be bought pre-made or can be done at home using a perforating tool or machine.