If Foxtel is watched on PC or a Mac in a browser, it does shows ads. Will Google Analytics track traffic from these ads to our website when we advertise on foxtel?
I would say yes, if you tag your links correctly using UTM variables. See here for more https://support.google.com/analytics/answer/1033867?hl=en
UTM variables are query string parameters added to URL and delivered as part of the page url to Google Analytics (GA) allowing it to attribute the traffic correctly.
Three required parameters are;
So in your example, the ad destination could be; www.example.com/landing_page.html?utm_source=foxtel&utm_medium=cpm&utm_campaign=my_first_campaign
This way, such traffic will be attributed to foxtel/cpm traffic/source and to my_first_campaign campaign