The 'User Settings' page lets you control whether an ad's "stats" are viewable by the member.

Display the number of listing views - If you want your members to see the number of times their ad's details have been viewed, then choose "Yes" here. Otherwise, choose "No".

Display the number of views through search - If you want your members to see the number of time their ad has been included in a visitor's search results, enter "Yes" here. Otherwise, choose "No".