Variables

A Variable allows you to basically use a dynamic value whose actual value will be resolved at the time the value is being accessed, for example this could depend on the current page URL, Referrer, Screen size, or more.

Create and manage

Manage variables in Matomo Tag ManagerCopy a Variable in Matomo Tag ManagerDevelop custom variables 

Matomo Configuration

Set up the Matomo Configuration VariableSet the User ID using Matomo Tag Manager

How to

Use variables within the Custom HTML tagUse variables within a Custom JavaScript variable

Data layer

Data layer in Matomo Tag ManagerData layer developer guide