When you install Kibana, it generates a Basic license with no expiration date. To start a 30-day trial, view the status of your license, or install a new license go to Management and click License Management.
The 30-day trial enables you to try out the full set of Platinum features, including security, machine learning, alerting, graph capabilities, and more.
At the end of the trial period, your license reverts to a Basic license. To continue using the Platinum features, purchase a subscription and update your license.
For a comparison of the Elastic license levels, see the subscription page.