Re: how to figure out to add trackable phone number in google.
If you just want to add a call extension to your desktop or mobile ads then you can follow Google's directions at the following link:
Scroll down to where it says, "Set up call extensions."
The directions aren't very specific so once you are in the Call Extensions view, click on the box for "select extension" and at the bottom of the drop down there is a link for "create new extension." The settings default to all devices with a google forwarding number. By choosing this option you will be able to see call data inside adwords and in the dimensions report.
Hope this helps,