Device Targeting With Platform-level Keys
Describes the common platform-level key-value pairs you can use to target users with device-related variables across all properties in your Audience Manager account.
Purpose of Platform-level Variables
Platform-level variables let you take data passed in from a particular site and make it available for targeting across all the properties in your Audience Manager account. These variables are formed by key-value pairs with the key prefixed by d_ as shown below.
Platform-level Keys Defined by User Agent
The Data Collection Servers extract the values for these keys from the user agent header in HTTP requests. The values represent device-level information from the Device Atlas database. The signals in the table below are available, as extracted from the user agent example. Download a list of the most common keys , according to Device Atlas measurements.
Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3
Even if one or more signals cannot be retrieved from the user agent header, the other signals will still be passed to the Data Collection Servers.