Ecommerce Items to String or Sum Item Values is a Google Tag Manager Server-Side Variable Template (SGTM).

This Variable turns the Ecommerce Item array (e.g. [{item_id: ’12’, quantity: 1},{item_id: ’34’, quantity: 2}]) into a string (e.g. ’12|34′), or sums Item Values (e.g 3). When summing values you can choose to multiply the value with quantity (e.g. [{price: 10, quantity: 1},{price: 20, quantity: 2}]) which will give the result 50).

The Template is available in the Google Tag Manager Template Gallery.

Variable Functionality Overview

• Select Mapping Method
  • GA4 Standard Ecommerce Events
  • Custom Mapping
• Select Item Parameter Type & Action
  • Create String from Item Parameter
    • Standard Item Parameters
    • Custom Item Parameters
    • Choose Delimiter
    • Return Unique Items
  • Sum Values from Item Parameter
    • Standard Item Parameters
    • Custom Item Parameters
    • Multiply Item Value with Item Quantity

Full documentation of the Template can be found on Github.

Related Information

A similiar Variable for Google Tag Manager (Web) does also exist:

• GA4 Ecommerce Items to String or Sum Item Values – GTM Template (Web)

Possible use cases

• Use the Variable to create Ecommerce value by multiplying price with quantity (if this is missing in the implementation)
• If you need to track data both on Item Scope and Event Scope, use this Variable to create Event Scoped data.
• Send Items data as a string to ex. Floodlight for marketing purposes.

Image of the Template