A family of Microsoft suites of integrated development tools for building applications for Windows, the web, mobile devices and many other platforms. Miscellaneous topics that do not fit into specific categories.
If you buy a vs subscription, you get a subscription id, not product key. The subscription is tied to a Microsoft account. When you authorize visual studio, you login into the account and pick the subscription.
visual studio product keys are used when you buy vs without a subscription. In this case you activate with the product key. You must never lose this key, as it is required any time activation is required.