Once you have added your custom domain it won't work until the AdsBridge system automatically starts to ping your domains. So, you just need to wait for an hour to see your domain working. If the domain is working you’ll see a blue checkmark in front of its name. If it is not working you will see a red triangle.
To connect a domain you need to change a DNS server in the domain's billing. This can take up to 72 hours depending on what registering service you have used.