...
The Parameter Visibility can be set in three ways: Display and Sent values, Display values and Sent values. The users can choose which values will appear after the execution of the workflow. This setting is saved per workflow.
The View Parameter Summary settings refers to the Parameter summary window that appears after configuring all the parameters in a workflow. In this window the user can see all the parameters that are visible and the configuration added to them, as well as scheduling information. If the toggle is set to false this page will not appear.
...