If I understand correctly, and @mpetyak can correct me if I'm wrong: writing prompts for GPT-3 is something of an art. This lets you save your prompts, and lets other people execute them, to see what GPT-3 comes up with. It even supports fields for the end user to fill in, so they can see the output without having to worry about what the prompt was.
Thanks egonschiele, I would say your summarisation is quite accurate :)
There is definitely more work to be done on the positioning/landing page text, I do hope that the service will grow into something more general than just GPT-3 prompt organising and sharing, but should maybe keep it more grounded/specific for now