What is IoT helium?

Could you please elaborate on what IoT helium is? I'm curious to understand how it fits into the broader context of the Internet of Things and what specific benefits or applications it offers. Is it a new technology, or is it simply a term used to describe a certain aspect of IoT? Additionally, how does it relate to the world of cryptocurrency and finance, if at all? I'm eager to learn more about this topic and how it may impact the industry in the future.