Wassat?
It used to be a thing back in the older days of the internet. People could go there to "acquire" a dragon egg, which they would put in their signatures on forums and other places they frequented. Each click helped hatch your egg, and then once they were hatched you could later breed them with other dragons to make your own lineages or style of dragon (like the ones
@Tyler Night has above). It's been around since the early aughts, so that's why I'm surprised the place is still up and running.