...
Notifications: Allow you to send notifications when certain things happen, e.g. when a gateway is running out of disk space, or an API performs considerably slower than it should. You can also send notifications when migrations start or fail.
Notification integrations can be deactivated. These can then still be used to create automations, but they do not send messages.
Repositories: Repository integrations allow you to browse said repositories for APIs and register them within the API Gateway Manager. Please note, that you can always use git native tooling to register APIs with the Gateway Manager. The integrations for GitHub and GitLab are a bit faster and allow you to search for APIs stored in the respective service.
Issue-Tracking: Issue-Tracking integrations allow you to open service cases when certain things happen. For a list of possible triggers see Automations
Security: The security integrations allow the API Gateway Manager to communicate with other security related systems in your company.
...