If you wish to track the URL of a webpage using Tag Manager, what kind of user-defined variable should you use?

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If you wish to track the URL of a webpage using Tag Manager, what kind of user-defined variable should you use?

·         Page Path variable
·         URL variable
·         Click Classes variable
·         DOM element
GA
Gaurav Arora, Digital Media Lead. 10+ years running paid media and tracking for brands in the USA, UK and Canada.