Shortcuts are shortened URLs that you can use for marketing and tracking purposes. They redirect to the permalink for your game, so even if you change the name of your game they'll continue to work.
Your game must be published to add shortcuts, and each game may have a maximum of 3 shortcuts. The shortened URL you choose may only have English letters and numbers, as well as dashes and underscores. If you submit a slug with invalid characters, those characters will be replaced with dashes.
Official Announcement: https://news.thegamecrafter.com/post/670748714056499200/shortcuts