Personal data needs a clear purpose.

• An email address voluntarily provided in contact or early-access forms.
• The topic selected when a contact is registered.
• A commercial interest selected after accessing a free resource.
• Visit origin supplied by campaign parameters, such as channel and campaign.
• Aggregated technical and usage data, only after cookie consent.
• The consent preference stored in your own browser.
• Workbook answers stored only in your browser. StackDocs does not receive that content.

We use this information to respond to contacts, send requested invitations, understand site use, correct problems and improve content. We do not sell personal data.

With your permission, Google Analytics measures visits and interactions, including pack views, signups, downloads and site searches. You may decline measurement in the cookie notice and reopen that choice from the footer.

If advertising is enabled, third-party providers including Google may use cookies for ad delivery and measurement. Any new purpose will be reflected in this policy before activation.

The “First AI process” workbook uses local browser storage to preserve answers on the same device. The content is not sent to our servers. You can delete it from inside the workbook or by clearing local browser data.

We retain information only for the time needed for the stated purposes and apply reasonable technical safeguards. No internet-connected system can offer absolute security.

You may request access, correction, deletion or withdrawal of consent under applicable law. Use the contact page and select “Privacy and data”.