When would you use a validation rule?

Direct Answer

Use a validation rule when the platform should block a save unless the record meets a clearly defined business rule.

Detailed Explanation

A strong answer includes examples like conditional required fields, stage-based rules, or format checks, and emphasizes that the error message should tell the user exactly what to fix.

Why the Interviewer Asks This

The interviewer is checking whether you can connect data quality logic to real admin work.

Weak Answer Warning

A weak answer only says validation rules make fields required.

Stronger Answer Direction

Show that validation rules are conditional quality controls, not just static requirements.

Follow-up Question

When would Flow or Apex be a better choice than a validation rule?