Schema Diff` in Neon allows developers to easily track changes to their database schema by comparing schemas between the current and past state of a branch, providing benefits for debugging, code review, and cross-team collaboration. This feature creates short-lived, ephemeral branches that can be used to compare the current and previous states of a branch. Additionally, `Protected Branches` in Neon prevent unauthorized access to sensitive data by restricting database access to trusted IP addresses or other rules, allowing developers to build with confidence without compromising development velocity. These features are designed to provide greater control over database security and schema changes, enabling teams to ship with confidence while maintaining development velocity.