You can control your Squadcast incidents from Slack as well.
Firstly, go to the integrations page from the sidebar and under Slack tab click on Integrate button and follow the on-screen flow.
That's it! Now you will start receiving alerts on your Slack channel and you can Acknowledge or Resolve Incidents directly from Slack.
Also, whenever an action is taken on Squadcast like Acknowledge, Re-assign or Resolve, it will get posted on Slack as well, so everyone can remain updated about the status of the incident.