# Advertiser Postback Report · the values arriving

Demo id: `2ad8662c-74fe-47f4-9448-affba1ec7b64`

Play: https://demo.everflow.io/preview.html?id=2ad8662c-74fe-47f4-9448-affba1ec7b64
Share: https://demo.everflow.io/s/2ad8662c-74fe-47f4-9448-affba1ec7b64

Each step is the tooltip the visitor sees, a one-line description of the screen, and what that screen is in Everflow. Generated from `screens_json` — not a second CMS.

## Step 1 · Advertiser Postback Report · the values arriving

- **Screen:** Advertiser Postback Report · the values arriving
- **In Everflow:** Postbacks (S2S) are server-to-server conversion tracking between the advertiser, Everflow, and the partner.
- **Tooltip:** The proof that setup worked is here, before any rule fires. Every inbound postback carries the customer ID and the data points on the end of the URL. If a value is missing from this report it was never sent, and no rule will ever see it.