A Christmas tree is a type of evergreen tree that is typically used as a decoration during the Christmas holiday season. It is a symbol of the holiday and is often decorated with lights, ornaments, and other decorations. It is usually set up in the home and is a focal point of many Christmas celebrations. The tradition of using a Christmas tree began in Germany in the 16th century and has since spread around the world. It is now a beloved part of many Christmas traditions, and is often seen as a symbol of the spirit of the holiday.