Here's how to use a subpage domain. Make sure you are already using a custom domain if you want to use a subpage domain.

Domain sub pages are pages after your custom domain on s.id.

Can I use a subdomain on s.id?

To use a custom domain on a microsite at s.id, make sure you have a domain first

URL shortener is a website system that can help you convert long links to short and many recommended URL shortener service sites that you can use