Certain add-ons may require an additional system-, organisation-, group-, or user-specific add-on configuration in order to function. For example, this could be a preferred user, group or default setting of the add-on, or an authentication token to connect with a third-party system. This is highlighted once the add-on have been installed. 

Once an add-on is installed, navigate to the add-on's details page and click the Configure link.

In the pop-up dialogue, you can set the configuration of the add-on. Once the add-on has been configured, the add-on will be highlighted accordingly. Please note that this label does not specify whether the add-on has been correctly configured, it only indicates that configuration options have been adjusted from their default setting.