What is 'listing mode' for Profiles?
Listing mode in profile enables the user to do a follow up search for other records which also have that same field value. 

For example, you might set City to Public Pages and Listings. After the user conducts a search and views the details for a record they can search on the city value and look for other field values present in the record.

FWIW, If you don't want to navigate the user to listing page on hitting the cancel button, you can add a custom URL for this button in profile settings. It also provides a flexibility to simply remove the cancel button from profile.



The above config is present in Advanced Settings pane in the profile settings form.