> ## Documentation Index
> Fetch the complete documentation index at: https://docs.frenzy.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Frenzy AI <-> Klaviyo User Identification

Frenzy AI uses the [Shopify](https://www.shopify.com/ca/legal/cookies#merchant-storefronts) `_shopify_y` cookie to identify users across all personalization touchpoints on the website.

This user ID is then mapped to an email address through the following scenarios:

* **Email Sign-Up Forms**<br />When a user submits their email via a signup form, Frenzy AI links the Shopify user ID with the provided email address.
* **Post-Purchase**<br />Once a user completes a purchase, Frenzy AI links the Shopify user ID with the email address used at checkout. Please note that the purchase must occur on the website, and the product should have been added to the cart from the PDP or any other Frenzy AI-powered touchpoint.
* **Website Visits via Email Campaigns**<br />When a user clicks through an email (e.g., from Klaviyo) and lands on the website, Frenzy AI connects the Shopify user ID with the email address tied to that campaign.

***

#### **FAQs**

1. **Which users eligible for personalized recommendations?**
   1. **When Frenzy AI Search & Collections are enabled, but Klaviyo integration is \_not**\_\*\* active:\*\*
      1. Users who have made a purchase after Frenzy AI was enabled are identified and eligible for personalization.
      2. Users who have only signed up for newsletters (without making a purchase) are not identified and are not eligible for personalization.
      3. First-time visitors are not identified and are not eligible for personalization.
   2. **When Frenzy AI Search & Collections are enabled, and Klaviyo integration \_is**\_\*\* active:\*\*
      1. Users who have made a purchase after Frenzy AI was enabled are identified and eligible for personalization.
      2. Users who have signed up for newsletters (even without a purchase) are identified and eligible for personalization.
      3. First-time visitors are not identified and are not eligible for personalization.