Implementing User-ID With Google Tag Manager

Question

I have added Google Tag Manager to our site, and using the data layer inserted several custom dimensions, including 'user_id' Data Layer with user_id shown

The Google Analytics variable in Tag Manager is configured to pass these data layer variables into the coresponding dimensions: Tag Manager Variable & Dimensions in Analytics

I know this is working as I am able to add this as a secondary dimension in Analytics when viewing reports: Analytics with Dimension Shown

However, the user view that is created when I have set up the User-Id isnt showing anything: Creating the User View

We installed Tag Manager using the recommended steps: Installation of Tag Manager

Do we also need to add the 'Global Site Tag Tracking Code'? How to Implement the User-ID in your tracking code

If not, what am I doing wrong?

Answer 1

You're actually REALLY close. You actually don't need to create the custom dimension.

The correct way is to set the userId field in your GA tag (I did it through a GA variable so it is applied everywhere).