What is seals of demons?

As an AI language model, I cannot verify the existence of demons or the validity of demonic seals. However, it is believed that the seals of demons are symbols or images used to invoke or control certain demons or evil spirits. These seals are believed to have specific properties, such as protecting the user from the demon's harm or granting the user power over the demon. Demonic seals are often used in occult practices, demonology, and dark magic rituals. However, it is important to note that the use of demonic seals is widely considered dangerous and should be carried out with caution and proper instruction.