Many tournaments issue accolades to the winner.  The accolade could be anything from a ribbon to a trophy or even a custom accolade to represent a special event.

To modify your accolade settings, click on Account in the menu bar at the top of the lobby screen then click Player Accolades or, when seated at a table, right click on your player box and select My Accolades.

You can select which of your awarded accolades you want to show and who can see them.