A more thorough explanation:

Definition: thereof, adv. - Referring to that, it, or them. Example: The company reported a loss of profits, and the reason thereof was due to the decrease in sales. Explanation: In this example, "thereof" is used to refer to the reason for the loss of profits. It is a formal way of saying "the reason for it." Example: The book was filled with interesting stories, and the moral lessons thereof were valuable. Explanation: In this example, "thereof" is used to refer to the valuable moral lessons that can be learned from the interesting stories in the book. Overall, "thereof" is a word used to refer back to something previously mentioned, and it is often used in legal or formal writing.