If you would like to create a leaderboard this is the way to do it.
When you're creating a competition you have the option in the General tab to create a Competition Tag.
With this tag set up all corresponding pieces of content will have voting enabled.
Once you've created your competition and the associated tag as well, you can now create a filter for this specific tag.
In the Create a New Filter section you'll have the drop down menu Sort by and there is an option for Votes.
Once you've saved your new filter you can use it to create a widget and display your leaderboard.