This help page contains the bid modifier specifiers for all dimensions. Here's a list of all supported dimensions:
Ads
Publisher
Media Source
Geo (country, state, DMA)
Device (desktop, mobile, tablet)
Placement (web or in-app)
Operating system
You should use the specifiers listed below when creating a bid modifier CSV to be imported.
Ads
Use ad ID as reported in the dashboard for the ad specifier.
Publisher
Use the publisher domain name (as reported in the Publisher column) and media source slug (as reported in the source slug column).
Media Source
Use media source slug (as reported in the source slug column).
Country, state and DMA
Country specifiers use ISO 3166-1 alpha-2 codes. For a list of valid specifiers please consult this page.
State specifiers use ISO 3166-2 codes. For a list of valid specifiers please consult the country subpages available on this page.
DMA codes rely on Nielsen regions. More information is available here.
Device
Valid device specifiers are DESKTOP, MOBILE and TABLET.
Environment (formerly Placement)
Valid placement specifiers are:
SITE for website traffic and
APP for mobile in-app traffic.
Operating system
Valid device specifiers are ANDROID, CHROMEOS, IOS, LINUX, MACOSX, WINDOWS, WINPHONE, and WINRT.