What is the origin of this tradition?

Explanation

The first decorated trees were adorned with apples, strings of popcorn, white candy canes and pastries in the shapes of stars, hearts and flowers. Glass baubles were first made in Lauscha, Germany, by Hans Greiner who produced garlands of glass beads similar to the popcorn strands and tin figures that could be hung on trees. The popularity of these decorations grew into the production of glass figures made by highly skilled artisans with clay molds.