Right button-> Reload if the service window is not updated
Select your organization
Create new or link to already existing project or game id.
Enable Unity ads service
Back to the services
Copy the game id from the Unity ads service to the game editor
If Unity ads don’t work or you can’t see views in the dashboard: close Unity and delete ProjectSettings/UnityConnectionSettings file and relink your project and enable Unity ads again.
If you have an error like: The name `Advertisement' does not exist in the current context - restart Unity
Use Unity 2020+ it has Unity ads settings in the editor