The Square Knot, also known as the Reef Knot, is a type of binding knot used to secure two ends of a rope or string together. It is commonly used in various applications, including sailing, camping, and first aid. The knot is easy to tie and untie, making it a popular choice for both beginners and experienced users. To tie a Square Knot, take two ends of rope, cross them over each other, and then wrap one end around the other. Pull both ends to tighten the knot. It is important to ensure that the knot is tied correctly, as an improperly tied Square Knot can slip or come undone under tension.