What crime is online gambling?

Could you please elaborate on the nature of the crime that online gambling constitutes? Is it a violation of a specific law, or is it a broader concept that encompasses various forms of illegal activity? Are there specific penalties associated with engaging in online gambling, and if so, what are they? Furthermore, how does the legal landscape surrounding online gambling differ from one jurisdiction to another? I'm curious to understand the intricacies of this issue in more detail.