I signed up for a free account so I could poke around. Some of it looks really nifty! I was hoping it had a map-creating tool, as I can’t run Campaign Cartographer (would love to). But, alas, it does not. You create a map outside the site, then upload it. World Anvil then has a tool that can overlay pins and notes on top of it. But they are missing that primary tool of map creation itself. I would have considered using the site if it had that. Phooey.