The banding method is the process of wrapping small or medium-sized sections of wet hair up with elastic hair ties so that the hair is able to sit in a stretched position until it fully dries. Depending on how long your hair it, it can be a tad labour intensive considering all the extra hair ties you'll need for it, but the results are always well worth it.
Here's how you do it: after washing, conditioning, and detangling your hair like you normally would, part your hair into however many sections you'd like. Then, wrap each section in an elastic ponytail holder, working your way down the section from roots to ends until the entire section is wrapped. Remove all the elastic bands once all of your hair has dried and style it however you wish.