We're getting closer to sending in our slightly fake data, but we must configure IT services before the data comes in. In Zabbix, SLA results cannot be calculated retroactively. IT services must be configured at the beginning of the period for which we want to collect the SLA. SLA state is stored separately from trigger and event information, and is calculated at runtime by the Zabbix server.
Let's go to Configuration | Services. The interface for managing Services is different from most other places in Zabbix. We have root, which is an immutable entry. All other service entries must be added as children to it. Click on Add child next to the root entry.