Fusion Anywhere is a separate product which you can learn more about at https://fusionanywhere.com. If you are licensed to use Fusion Anywhere, this window is useful in troubleshooting situations. It will show the last 100 events that happened since Fusion Server was launched (this information is not stored anywhere, so it is not kept between launches). The list is updated approximately every two seconds.
It can take up to 30 seconds for Fusion Server to try to connect to Fusion Anywhere after it has launched or when Preference settings have changed. If there are issues with the connection, you can use the Restart Connection button to ask Fusion Server to try reestablishing the connection from scratch.
You can open this window by going to Fusion Admin → Utilities → Fusion Anywhere Status or Options → Fusion Anywhere Status in Fusion Server's Task Bar.