To see it in action:
Crust.piefed.social (the Piefed development instance)
Not all instances implement it yet, I guess it depends how often they pull from the dev branch
Example of search for 'movies'
!movies@lemmy.world is almost only composed of a single poster sharing articles from the Guardian.
!movies@piefed.social has a diverse mod team, with dedicated threads for movies, weekly discussion threads, and people sharing their own reviews.