# What is Validation rule?

> A validation rule is a formula that runs when a record is saved and blocks the save with an error message if the formula is true, for example requiring an amount once an opportunity reaches a certain stage. Validation rules enforce data quality without code.

Source: https://synconai360.com/glossary/validation-rule

## Why it matters

Duplicate or conflicting rules frustrate users, and rules that compare picklist values break silently when those values change.

## In SyncOnAI 360

SyncOnAI 360 finds duplicate validation rules, flags recently deactivated ones, includes them in dependency and impact analysis, and drafts new ones as proposals.

## Related terms

- [Picklist](https://synconai360.com/glossary/picklist)
- [Record-triggered Flow](https://synconai360.com/glossary/record-triggered-flow)
- [Salesforce technical debt](https://synconai360.com/glossary/technical-debt)