A vertical ribbon is a great way to add a decorative touch to your Christmas tree! You can start by measuring the length of your ribbon and cutting it into three equal sections. Then, fold the middle section in half and wrap it around the tree, starting from the bottom and working your way up. Secure it with a small piece of tape and repeat with the other two sections, staggering them slightly so that the ribbons don't overlap too much. Finally, add some ornaments or other decorations to really make it pop!