What does host fee mean?

Could you please elaborate on the term "host fee" as it relates to the cryptocurrency and finance industry? Specifically, in what contexts might this fee be applied? Is it a standard practice across all platforms or is it more specific to certain exchanges or services? Additionally, how does the host fee differ from other types of fees that might be associated with cryptocurrency transactions, such as transaction fees or exchange fees? Understanding the nuances of this term will help clarify its significance in the broader financial landscape.