Selecting this option will map your custom domain to all Geo Links in your account.
For example if your custom domain is https://yourdomain.com and you have the following Geo Links in your account:
Both the above links can be accessed by adding the link URL to the custom domain:
yourdomain.com/aSuapX will map to gtly.to/aSuapX
yourdomain.com/JasUEs will map to gtly.to/JasUEs
Modifying the page name
You can use a customized page name for example yourdomain.com/bags instead of yourdomain.com/aSuapX even if you select this option to map this custom domain to all Geo Links in your account.
To modify a page name, edit the Geo Link, visit the 'Short URL' page and you can modify the page name to suit your preference. The above mapping will still be valid, however the custom page name will take priority.