About accounting for advertising expenses
Using Yandex.Metrica, you can track the effectiveness of an ad campaign created in any advertising system. To do this, transmit information about the campaign to Yandex.Metrica. You can do this using:
Data can be transmitted in the Yandex.Metrica web interface or via the API.
To see which metrics are calculated based on the uploaded data and what you can do with them, go to the Sources, costs and ROI report.