Knotwork is a type of craft that involves tying knots in various materials such as rope, yarn, or string. The term knotwork is often used to describe the art of macrame, which is a form of textile-making that uses knotting techniques to create intricate patterns and designs. Macrame is a popular craft that has been around for centuries and is still widely practiced today. It is a great way to add texture and interest to any project.