Ordinal reporting provides transparency on which demand sources are winning each impression throughout your ad waterfall.
The above chart can be accessed by visiting Performance > Insights. Please note, impression data from devices which have limit ad tracking enabled is not included.
In effect, ordinal reporting measures the impression count per user, over a 24 hour period. So, the '1st impression' represents the 1st ad seen by a user each day (and is considered to be the most valuable to demand sources).
When analysing your ordinal data, it's worth considering the following:
The fill rate for each demand source, viewable on the mediation performance pages.
The fact that Tapdaq's algorithm automatically A/B tests each demand source throughout different positions in your waterfall to ensure pricing is fair.
If you don't filter your ordinal data by country, it will likely appear that there is a mix of demand sources competing strongly for each impression. This is due to the fact that rarely does a single demand source out perform all others in all geos.
Note: Ordinal reporting is a level of transparency is unique to Tapdaq, and is made possible thanks to our unbiased operating model.