Ribbon is a popular decoration for Christmas trees and adds a touch of elegance and beauty to the holiday season. To put ribbon on a Christmas tree, start by selecting a ribbon that complements your tree's color scheme and style. Then, take one end of the ribbon and tie a knot at the top of the tree. Next, wrap the ribbon around the tree in a diagonal pattern, making sure to tuck the ends behind the branches. You can also use multiple colors and patterns of ribbon to create a unique look for your tree. Don't be afraid to experiment and have fun with it!