Bind-offs and borders serve different purposes in knitting projects. Casting off is the process of securing stitches and creating a stable edge at the end of the project. It’s always necessary. On the other hand, borders enhance the overall design, provide structure, or prevent curling. They are not always necessary. You may need to cast off first then work the border separately. Other borders can be achieved without binding off first. In this case, you’re often working additional rows of knitting in a new stitch pattern after finishing the main body. Adding a crochet border after binding off the knit stitches can also be an effective and beautiful way to make a project larger or more elaborate.