This enum is used to indicate if this campaign is a normal campaign, a draft campaign, or a trial campaign.
||Invalid type. Should not be used except for detecting values that are incorrect, or values that are not yet known to the user.|
||This is a regular campaign created by the advertiser.|
||This is a draft version of a campaign. It has some modifications from a base campaign, but it does not serve or accrue stats.|
||This is a trial version of a campaign. It has some modifications from a base campaign, and a percentage of traffic is being diverted from the BASE campaign to this trial campaign.|