Pixel URL's are structured slightly differently from the standard reporting URL's to avoid conflicts with query parameters. In general they follow this format:
As the response for this URL has to contain a 1x1 pixel gif, validation messages
are available via HTTP response headers prefixed with
To track impressions, third-party cookies are used. In CUBED Attribution this is achieved by generating a random Sync ID for every impression and storing this into a third-party cookie.
When the user returns to the site. This Sync ID is used to join the two visitors together.