Because creating an App campaign involves multiple configuration steps, see the
complete [`AddAppCampaign`](https://developers.google.com/google-ads/api/samples/add-app-campaign) sample for an
end-to-end implementation.

This example creates an install-focused campaign
(`AdvertisingChannelSubType.APP_CAMPAIGN`) targeted to two specific languages
and geographic locations, and populates the required
[`AppAdInfo`](https://developers.google.com/google-ads/api/reference/rpc/v26/AppAdInfo) headlines and descriptions.