Let's say that one of the monitored websites has gone down completely. What happens is that the monitor on the status page turns red and announces Downtime.
To give our users more insight, we will create a new report called Homepage is unavailable and change the status of the homepage monitor from not affected to Downtime. We can also provide a brief description of the incident, such as: "the example.com website is down for all users".
Then, we can start investigating the issue, and once we have an update (for example when we see that our cloud provider is having problems), we can create a status update containing this item of information.
When our cloud provider fixes the issue, and the homepage comes back up, we can create a new status update, switching the affected services dropdown menu to Resolved.