Use case: 

Imagine that you have to process and download a file that takes more than 5 minutes to generate.
You don't want to have screen timeouts, neither the user wants to wait all that time.
In this scenario, a BPT Process or a Timer is recommended to process the file.
 This component may be useful to validate if the file is available for download.

How to: 

• Put the widget inside an if controlled by a boolean variable;
• Define a refresh rate; (AVOID less than 5 seconds);
• Set the handler screen action with the logic that verifies if the process is complete;

Notice: 

• Every 5 seconds the AutoRefresh action runs;
• You must include there only the logic to check if your process is complete;
• Avoid heavy queries, have in mind that this makes server calls every 5 seconds and is multiplied by the number of users that are using the screen.