Forming into a knot, commonly known as tying, is the process of using two or more pieces of material to create a secure bond. This can be done with rope, string, fabric, or other materials. The most common form of tying is to form a knot, which is done by looping the material around itself and then pulling it tight. This technique is used in many different applications, such as securing items together, creating a handle for carrying items, and even in medical procedures.