code: private void updateConversationAdvertiserIdentifier(Conversation conversation) {
  		checkConversationQueue();
  
  		try {
  			Configuration config = Configuration.load();
  			if (config.isCollectingAdID()) {
  				AdvertisingIdClientInfo info = AdvertiserManager.getAdvertisingIdClientInfo();
  				String advertiserId = info != null && !info.isLimitAdTrackingEnabled() ? info.getId() : null;
  				conversation.getDevice().setAdvertiserId(advertiserId);
  			}
  		} catch (Exception e) {
  			ApptentiveLog.e(ADVERTISER_ID, e, "Exception while updating conversation advertiser id");
  			logException(e);
  		}
  	}
docs: region Advertiser Identifier