Cross-domain refers to a situation where the same website spans two or more domains. The chairman email list setting that allows you to view measurement data of websites in a cross-domain state all at once on Google Analytics is called cross-domain tracking.
In Google Analytics, if the domains are different, they are treated as separate data even if it is the same website. Since it is not displayed as a single report, it is not possible to grasp detailed data on users who visited the website. Cross-domain tracking improves this situation.
Once you customize your tracking code, you'll be able to view your reports as a single website.
Uses for cross-domain tracking
Cross-domain tracking is used to accurately grasp data when one website has different domains. For example, it is also effective for websites that use rental services such as inquiry forms and purchase forms on e-commerce sites, product pages, purchase pages, and shopping carts.
In the case of e-commerce sites, product pages and purchase pages are often created on different domains, so using cross-domain tracking makes it possible to obtain accurate data.
What happens if you don’t use cross-domain tracking on your subdomains?
If you do not configure cross-domain tracking on the subdomain, Google Analytics will assume that the domain and subdomain are different. In that case, you will not be able to see the linked information between the two domains. Also, there will be an issue with the request URL being the same.