To debug your flows you can use a special node named Debug. Debug nodes makes it possible to probe message object passing between nodes.
In the above example the value scraped from the web page is added to message object for the coming nodes to process, if you put a Debug node after the node named "Get Value" it is possible to see this value.
The message object may become complicated through out the flow. In order to just see the field you are interested you can click on the Debug node and update the properties section at the right side of the Flow Designer.
After this update the debug output will only show the message object id and requested field as below