How Does the Concept of ‘Unbonding Period’ Enhance the Security of a PoS Chain?

The unbonding period is a mandatory time delay (e.g. 7-28 days) that a validator must wait after initiating the withdrawal of their staked coins before the funds are available.

This period enhances security by giving the network time to detect and penalize any malicious activity (slashing) the validator might attempt before they can escape with their capital. It is a critical deterrent against 'griefing' or 'exit' attacks.