What is a CDSC fee?

Could you please explain what a CDSC fee stands for and what purpose it serves in the cryptocurrency and finance world? I'm curious to know if it's a common fee associated with transactions or if it's more specific to certain types of investments or services. Additionally, could you elaborate on how this fee is typically calculated and when it's applied to a transaction or investment? Understanding the nuances of this fee will help me make more informed decisions in my own cryptocurrency and finance endeavors.