serdik Hi there! When you have mediation linked this allows Adsense to compete against Google's Ad Exchange and Ezoic's other ad partners for the ad inventory on your site. Whoever is willing to pay the most wins the impression, ensuring that you're paid the highest amount possible.
On the Ezoic Dashboard, you'll see the 'Mediation Ad Partner' earnings reported. Money collected through Mediation will be paid by Google to your own account and be reported in Ezoic as 'mediation earnings'. Any other earnings on your traffic going to your original site are also handled separately from Ezoic.
More information can be found here: Google Adsense And The Mediation App
I recommend checking that Ezoic is enabled as a third party in your Adsense account, and that the mediation earnings reported in your Ezoic dashboard approximately line up with the reports you're seeing in Adsense (we expect a slight discrepency due to reporting differences).
I hope this helps,
Monica