| Pixel app | VTEX IO app type that runs a script in the storefront <head> to forward events to a tracking endpoint. |
| Publisher ID | UUID issued by the VTEX Ads operational team that identifies a store/seller in the Ads platform. Configured per store via app settings. |
| Offsite banner | A VTEX Ads ad creative served outside the storefront (e.g. on partner sites). A click on it lands the user on the store with tracking params in the URL. |
naid | URL query parameter — the ad id of the clicked offsite banner. Required for the tracking beacon to fire. |
ncid | URL query parameter — the optional campaign id attached to the offsite click. |
gadv_id | URL query parameter — optional Google Ads click identifier propagated to the tracking beacon. |
| MAC ID | Anonymous user identifier persisted in the VtexRCMacIdv7 cookie; used as the user_id on tracking beacons. |
| Beacon | A non-blocking HTTP request (fetch with keepalive) that reports a tracked event to the Newtail endpoint. |
| Sourcing component | Tag (PIXEL_VTEX_ADS_AGENT) added to ads_sourcing_components so downstream attribution knows which surface produced the event. |
| Newtail | The platform behind VTEX Ads; tracking beacons target events.newtail-media.newtail.com.br. |