Hi!

This is a modal. It'll only show up once per device. Once you hit the escape key or click on the button in the top right hand corner this will be hidden and you won't see it anymore.

To see this again after dismissing it use Incognito mode, or open up the console, go to Application, Storage, Local Storage, and then click on the URL that matches this one.

Delete the item there named hidden and refresh the page.