In order to ease the reading of a complex Job based on numerous connections, you can use the connection settings to avoid using the tFlowMeter component.
Proceed as follows:
Select the connection linking the two components that you want to monitor.
On the Component view, select the Advanced settings tab.
Select the Monitor this connection check box.
Fill in the required parameters, as detailed in the tFlowMeter section of the Talend Components Reference Guide.