# Adjust - S2S Tracking

To activate Adjust install attribution & bootup postbacks, add your app’s [Chartboost app ID and app signature](/en/faq/most-popular-faqs/) to your Adjust dashboard under **Partner Setup > Chartboost**.

![](/assets/images/articles/2023_advertising_s2stracking_adjust_001.png)

Then [request S2S tracking](/en/faq/advertising/) from the Chartboost dashboard.

Set the following:

-  **Revenue Forwarding** to **ON**.
-  **Attributed Only** to **OFF**.
-  **Parameter Forwarding** to **OFF**, unless you are mapping the Event Label value from the Adjust SDK.
-  **Session Forwarding** to **ON**. This allows us to send bootups.
-  **Probabilistic Attribution** to **ON** if your app is using probabilistic matching/SKAN.



## View Through Attribution (VTA)

View-through attribution (VTA) allows you to register installs that are seen when a user installs your app within a short timeframe after watching a video ad, even if the user did not click on the ad.

-   Capture the true reach of your UA campaigns versus traditional last-click methods.
-   More installs mean a higher eCPM, which can help your campaigns become more competitive within the Chartboost network.

**We recommend setting impression-based attribution with both device matching and probabilistic matching.**

Device matching is automatically always set to ON for Adjust.

To enable device matching and probabilistic modeling in your Adjust impression-based attribution:

1. Find your app and select the app options caret **(^)**.
2. Select **All Settings** > **Attribution** > **Impression Based Device Matching** or **Impression Based probabilistic modeling**.
3. Turn on **Device matching for impressions**  and  **probabilistic modeling for impressions**.
4. We recommend setting an [attribution window](https://help.adjust.com/en/article/attribution-windows) of 24 hours for device matching and probabilistic modeling.
5. Select **SAVE**.

Refer to  [Adjust’s App-level attribution settings](https://help.adjust.com/en/article/attribution-settings#impression-based-attribution-settings)  instructions for further details.  



## You might also like…

-  [S2S (serving-to-server) tracking:](/en/advertising/s2stracking/setting-up-s2s-tracking/)  Leverage install attribution from third-party platforms to create CPI campaigns on the Chartboost network
-  [In-App Purchase Tracking via S2S](/en/advertising/s2stracking/in-app-purchase-tracking/)  Setup In-App Purchase Tracking settings for MMPs.