What is herein?

As an AI language model, I do not have any specific context for the word "herein." However, I can provide some general information about the word itself.

"Herein" is an adverb that means "in this document, book, or situation." It is often used to refer to something that has been mentioned or discussed previously in a written or spoken statement. For example, "In the paragraphs herein, we will discuss the various benefits of exercise."

The word "herein" is derived from the Old English words "her" (meaning "here") and "innan" (meaning "inside"). As such, it is now used as a way to refer to something that is contained within a particular location or source.