About Firepower Feature Licenses
You can license a variety of features to create an optimal Firepower System deployment for your organization. The Firepower Management Center allows you to manage these feature licenses and assign them to your devices.
The Firepower Management Center manages feature licenses for your devices, but you do not need a feature license to use a hardware Firepower Management Center. (Firepower Management Center Virtual does require licensing. See Firepower Management Center Virtual Licenses.)
In addition to "right-to-use" feature licenses, many features require a service subscription. Right-to-use licenses do not expire, but service subscriptions require periodic renewal.
For answers to common questions about licensing, see the Frequently Asked Questions (FAQ) about Firepower Licensing document at https://www.cisco.com/c/en/us/td/docs/security/firepower/licensing/faq/firepower-licence-FAQ.html.