What is this shout out thing on Product hunt? And how does it work?

You can shout out people's comments under your post I guess ps. ringly.io launch is live today

If you mean shoutouts for product launches, it means you can shoutout max 3 companies that have helped you with building your product. For Ringly.io, we used the company ElevenLabs, so we made a shoutout to ElevenLabs. Btw, would you please support our launch today? You can click on my profile and then on the launch page. You'd really help me out with that!