When someone submits one of your forms, the submission goes to your CRM as usual — and CRM Butler keeps its own record of it. That gives you a separate, independent trail of what was submitted and when.
Audit logs are a paid add-on. You can switch them on for every form, or enable them only on the specific forms where you need the extra record — useful when just a handful of forms handle sensitive or high-value data.
You can also turn the feature off entirely at any time.