Hi,
When you buy an Enterprise or a Platform product, you receive an email with your license key and the links to download your products with Talend Administration Center(you can either install your products manually or install them with the Talend Installer).
For a detailed, please refer to
TalendAdministrationCenterUserGuide.
In addition, Talend Administration Center can be used in Talend ETL jobs, however, it is only available in Talend Enterprise subscription version.
Best regards
Sabrina