Subdomains
Track related hosts under one Website and preserve browser identity across them.
Track hosts under one root
Register northstar.app as a Website. Install that Website's snippet on each host you want to measure:
| Host | Register separately? | Install snippet? |
|---|---|---|
www.northstar.app | No | Yes |
app.northstar.app | No | Yes |
docs.northstar.app | No | Yes |
The _gt_id cookie is scoped to the registered root, so a browser can keep the same anonymous ID across those subdomains. Graytower records observed hosts after it accepts pageviews. A different root domain needs to be registered as an additional domain; it is not automatically included because it points to the same product.
Move between different roots
For a journey that crosses registered root domains, use Graytower's copied snippet and normal links between those roots. The tracker can carry visitor and session context in the link and remove the temporary transfer parameters on arrival. Test the complete journey after deployment.