The role of the Experience Cloud ID service in the Adobe Experience Cloud.
The Experience Cloud ID service enables the common identification framework for the Experience Cloud Core Services, solutions, and customer attributes and audiences in the People core service. It works by assigning a unique, persistent ID to a site visitor. When your organization implements the ID service, this ID lets you identify the same site visitor and their data in different Experience Cloud solutions.
Also, the ID service can replace the different solution-specific IDs (e.g., Analytics AID). And, through the Customer IDs and Authentication States functionality, the ID service lets you pass in your own customer IDs to the Experience Cloud. Keep in mind, however, that the ID service only works with the solutions you're already subscribed to. It won't provide access to other products if you're not signed up for them.
Going forward, the ID service is an integral component of many current and future Experience Cloud features, enhancements, and services. Currently, the ID service supports Analytics, Audience Manager, and Target. And, it is required if you want to participate in the Adobe Experience Cloud Device Co-op. If you have not implemented the ID service, now is the time to start considering a migration strategy. For more information about the importance and role of the ID service, see Why the Experience Cloud ID Service Should be on Your Radar.
To sum up, the ID service:
Your solution and other Adobe code libraries must meet these requirements before you can use the ID service.