rm hidden attribute

Author: forstisabella

src/connections/sources/custom-domain.md

@@ -1,7 +1,6 @@
 ---
 title: Segment-Managed Custom Domain
 plan: custom-domain
-hidden: true
 ---
 
 Custom Domain is a fully-managed service that enables you to configure a first-party subdomain over HTTPS.  You can then track event requests through your own domain (for example, `cdp.mydomain.com`), instead of the default (`segment.com`). Tracking events through your own domain allows for more secure and complete first-party data collection by reclaiming first-party data lost to browser controls. With a more complete view of your customer behaviors, you can build more robust profiles for greater attribution and ROAS.