Yes ,I use intel XDK.
Ok,which that means the option "signed"that appears on intel XDK??
Then the ID is a URL , but I am an amateur developer and I haven´t website.
Yes, enable the "Signed" option to sign your app and publish it in an app store like Google Play.
You don't need necessarily to have a website to publish your app. E.g., you can to use something like "com.caracul.yourapp".