This cookie is essential to Groundhogg functionality in many cases. It enables Groundhogg to know who is currently browsing the site and associate site actions to the correct contact profile.

This cookie is set in the following situations:

• A visitor fills out a form on your website and subscribes to your list. The form must be a Groundhogg form itself or connected to Groundhogg through a form integration.
• A visitor clicks a tracking link in an email or text message sent by Groundhogg.
• A visitor makes a purchase through one of our e-commerce integrations.

The data in the cookie is encrypted with a unique site key so that it can never be exploited by browser-based malware.

The cookie can contain the following information:

• The visitor’s Contact ID (always)
• Event ID (if the cookie was generated in relation to a specific event)
• Email ID (if the cookie was generated in relation to a specific email)
• Source (if the cookie was generated via a specific medium. Ex. “Email”)
• Action (if the cookie was generated via a specific action. Ex. “Link click”)