Generally, digital extortion, also known as "Internet blackmail," is aimed at revealing some aspect of the victim's personal life, found with information the target has stored on their computer. If you're the victim, this "information" could be intimate pictures you shared with someone, an aspect of your personal life that you'd prefer not be discussed or known by others, and so on. Often, the extortionist will request money, or perhaps intimate pictures or other information, in exchange for not ruining your online reputation.