Cats are notoriously attracted to Christmas trees, and keeping them off can be a challenge. One of the most effective methods is to create a physical barrier that prevents them from reaching the tree. You can use a gate or baby gates to block off the area around the tree, or you can place the tree in a room that is inaccessible to the cat. Another option is to use deterrents such as citrus spray or aluminum foil, which cats dislike the smell or texture of. Finally, you can provide the cat with an alternative source of entertainment, such as a scratching post or toys, to distract them from the tree.