Yahoo Enhanced Attribution works by leveraging a click ID to count post-click conversions, using a privacy-friendly mechanism that does not require or depend on a third-party cookie. These conversions are counted according to the attribution settings specified in the rule setup and those that meet all of the rule conditions.
Important
Click IDs are not identifiers and cannot be used for post-impression conversions, modeling or any other audience-building solutions in the Yahoo DSP.
To enable Enhanced Attribution in the Yahoo DSP, perform the following two steps.
Turn on the feature in the UI.
Ensure that a JavaScript Dot Tag is implemented on the client website.
In the DSP UI
In the DSP UI, navigate to the Advertiser in your seat.
Click into Advertiser Properties in the top bar.
In the bottom left corner, click the Enable enhanced attribution button.

Click IDs for the Advertiser will populate through the click-through url. The finalized Click ID value and macro are expressed as &vmcid=${CC} key-value pair in the landing page url. The actual value for the macro will be replaced in the URL.