As with other campaign types, you can use
to retrieve performance metrics for App campaigns. For example, the query below
will retrieve impressions and clicks from the last 30 days for all App
campaigns, segmented by date.
SELECT campaign.id, campaign.name, campaign.advertising_channel_type, campaign.advertising_channel_sub_type, campaign.app_campaign_setting.app_id, campaign.app_campaign_setting.app_store, campaign.app_campaign_setting.bidding_strategy_goal_type, segments.date, metrics.impressions, metrics.clicks FROM campaign WHERE campaign.advertising_channel_type = 'MULTI_CHANNEL' AND segments.date DURING LAST_30_DAYS
GoogleAdsService does not currently support reporting at the ad group or
audience levels, so all metrics must be fetched at the campaign level, even if
you have set up different settings per ad group. Ad group-level metrics
reporting will be supported in a future version.