Stream Alerts are the main way to thank your viewer and engage with them. An alert is shown for example when someone follows you or subscribes to you. You can configure Stream Alerts with third-party tools like Streamlabs. Stream Alerts can be PNG, GIF or WebM files, depending on if you want animated Alerts or Static alerts. When you configured your Stream Alerts correctly, your viewers will be able to send massages to your stream via their donations or subscription.