Webbing is a very robust woven band that's often used for bags, backpacks, belts, dog leashes, and similar items. Thread thickness and material vary. You can find slightly softer straps made of fine threads or very thick, robust ones made of strong threads. This is a firm and stable webbing.

Bias tape is cut at a 45° angle to the selvage and can therefore be stretched lengthwise. It is used for easy trimming of fabric edges. Another special feature is that the bias tape does not require any seam allowances. It is sewn around your raw edges so it doesn't change the dimensions of your sewing project.