Sending smart lists to Google AdWords
We are trying to work out if it's possible to send a smart list to our Google AdWords account in order to remarket to them. When I click "Send Via Ad Bridge", I can select Google, but when I click it, I get the below screen:

We have already integrated the two accounts (albeit with some errors), but that is to capture offline conversions. This interface seems designed to send audiences to AdWords, since this is how we send leads to Facebook Custom Audiences. Am I understanding this correctly? Why would my offline conversion data be connected to sending a list to AdWords? And since this is set up, why am I seeing this screen?
Thanks, any help would be appreciated!
Phil