This is used to hide the name input field at the start of the survey if you don’t want it. A setting of “No” will cause the field to be hidden. A setting of “Yes” or “Use Global” will cause it to appear.
Please note that if the name field is hidden, the anonymous question is also hidden.
Also note that you can hide one or all the name, company and email fields as they are all set individually, so for example if you only wanted the email field, you could hide both name and company.