An enum used to classify the types of changes that have been made to an adgroup/campaign during a specified date range. This only refers to the field of the entity itself, and not its children.
For example, if an AdGroup name changed, this status would be FIELDS_CHANGED, but if only bids on keywords belonging an AdGroup were changed this status would be FIELDS_UNCHANGED.
||The fields of this entity have not changed, but there may still be changes to its children.|
||The fields of this entity have changed, for example the name of an adgroup.|
||This entity was created during the time frame we're looking at. We will not enumerate all of the individual changes to this entity and its children. Instead it should be loaded from the appropriate service.|