What does unbonding period mean?

Could you elaborate on the concept of an "unbonding period" in the context of cryptocurrency and finance? Specifically, how does it work, and what implications does it have for investors and users? I'm interested in understanding the mechanics behind it and how it affects the liquidity and security of various blockchain networks. Additionally, how does the length of the unbonding period vary and what factors determine it? Thank you for clarifying this term and its significance in the crypto world.