The query will show an output that currently starts like this:
"display_name": "Hannover Fist",
"body": "Let me know if this should be migrated to <b>The Workplace</b>."
The output shows the highest voted comments on the site, sorted in descending order by score. The id, score, author and content of the comment are shown, as well as a link to the comment. If you follow the link, you will find that the comment is on the question Could I fake death to stop being Force-choked?
If you want to find the highest voted comments on another SE site (possibly a Meta), then click on the "" link after the bold text "Science Fiction & Fantasy" right under the "Try It" heading, enter the name of the site into the input box that will appear in place of that label, then click on the site name from the list that drops down, then click on the Run button.
The StackExchange API is an alternate interface for StackExchange sites that is optimized for stability and automated access. The pages in the documentation for the API that document individual methods in that API have a pretty-composer and pretty-printer form that lets you easily make queries to the API and print the results. The above link is a bookmark to such a pretty-printed query.