Botox treatment (or other brands of botulinum toxin such as Bocouture, Azzalure, Letybo, or Nuceiva) can be a great way to reduce the appearance of your necklines and wrinkles. As a muscle relaxant, botulinum toxin will reduce the pulling platysma muscle movement which will then reduce their appearance.
Treatment with neck Botox is not a permanent solution though; you'll need top-ups every three to six months.