Cross-Domain Linking in Google Analytics

Cross Domain Linking isn't a popular request and only a few agencies and experts know or have implemented such. However, this type of setup can be helpful for individuals managing several websites with almost the same products and services or managing domains copied from others.

It is impossible to track several domains just by adding Google Analytics tracking code on websites one wishes to track. Please note that this is also the reason why the Google Analytics code doesn't work once the domain name changes. Google uses the domain registered to the account for this. No data will be collected from other websites.

For this reason, Cross Domain Tracking/Linking is done using Google Tag Manager. The setup is done via Google Tag Manager and the Google Analytics Tracking code is added as a Tag on Tag Manager. This eliminates the need of adding a Google Analytics Consolidated View Tracking code on the website. Google Analytics code is already on Google Tag Manager so there is no need to add Google Analytics tracking code.