Device Preference of Ad Extensions
My question is that, if I want my ad extensions to show up on all devices including mobile, desktop, tablet etc. What should I do with the "Device Preference" checkbox on some of the ad extension settings.
1. Should I keep all of them unchecked?
2. Should I keep all of them checked?
3. Or should I keep two copies of the same extension contents, one set of copy with device preference checked, the other one doesn't? (like the screen shot below)