Service to generate Shareable Previews.

Only Performance Max asset groups and certain YouTube video/audio ad formats are supported. Other ad types, such as Responsive Search Ads or Responsive Display Ads, are not supported and return an `UNSUPPORTED_AD_TYPE` error.

The generated preview URLs cannot be embedded in an iframe because the response headers include `X-Frame-Options: deny`.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v23/services/shareable_preview_service.proto)
The following methods are available for this service:

- [GenerateShareablePreviews](https://developers.google.com/google-ads/api/reference/rpc/v23/ShareablePreviewService/GenerateShareablePreviews)