Flocking is the process of covering a Christmas tree with a fine layer of fake snow or flocking powder. It's a popular decoration during the holiday season, and it adds a whimsical and magical touch to any Christmas tree. The flocking powder is made up of tiny particles of white or colored material that sticks to the branches of the tree, creating a snowy effect. It can also add a touch of sparkle or glitter to the tree, making it even more festive and eye-catching.