You can receive certain data through your campaign content links using preset macros.  Just put one of these macros in square brackets and place it into the tracking links section of a campaign or on the campaign content URL (ex. utm_source=[did]).

Name Description
did Domain ID. Identifies site from which this visitor originated.
cid Campaign ID. Identifies the campaign from which this content is served.
adid Ad ID. Identifies the specific content in a campaign that was clicked.
click_key Click Key. Identifies an individual click.

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