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 that is part of a CampaignDraft or a customer-level Draft. 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. The type will continue to be TRIAL unless the trial is graduated. The TRIAL type will remain even on trial campaigns which are promoted back to the BASE campaigns.|