Step 14. How to implement GA4 login event on Shopify

We will implement here GTM tag that will be responsible for measuring login actions.

1. Implement data layer variables in Shopify.
   In this step we implement login status data layer variables into Shopify template. These variables we use later in GTM to sent them to Google Analytics. You need to add following code into the section before GTM snippet:
   Shopify Admin>Online Store>Themes>Edit your template code>theme.liquid)
   
   
   
   
2. Define new variables in Google Tag Manager
   Go to “Variables”
   
   
   
   then in “User-Defined Variables” section click “New” button
   
   
   
   then:
   
   a) Create “DL – login_status” data layer variable as follow (chose variable type as “Data Layer Variable”)
   
   
   b) Create “login_status_cookie” 1st Party cookie variable as follow (chose variable type as “1st Party Cookie”) to store current user login status
   
   
   
   
3. Create "login" trigger.
   Go to trigger section and create new trigger
   
   
   
   and create new “login” trigger as follow:
   
   
   This trigger will fire every time when login status will change from not-logged to logged-in. 
   Create "Login status cookie tag" where current login status is assigned to login_status_cookie variable from DL – login_status variable on every page view as follow:
   
   
   
   
4. Create "GA4 – login" tag using following settings and trigger that you have already created:
   
   
   
   After this implementation you will be able to see in you GA4 reports statistics connected to login action.
   
   
   
   
   Lets go to the next step of our guide which is: How to setup user ID for GA4 on Shopify.

Information About the Authors

Piotr Ulacha

Piotr Ulacha is a web analyst. He has 15 years of experience in the digital marketing area. He specializes in implementation of analytical and marketing tracking codes, creating dashboards and data privacy topic. He works currently as a Web Analyst at EverStores.com where he implement tracking solutions for eCommerce brands. Previusly he worked at SellerX with eCommerce brands and at Artegence where he analyses the impact of marketing campaigns for Volkswagen Poland.