"The following third-party partners may receive an ad request from Unity containing your Personal Data. This list may be updated from time to time. These partners use this information to build your profile and personalize your ad experience to serve future ads you may see on the internet as well as inside the Unity ad network."
Unity shares personal data with over 100 named third-party ad network partners and bidding partners (including Meta, Google, Amazon, Snap, and many others), all of whom use the data to build user profiles for ad targeting.