We have a 'Landing Page' category that actually doesn't get a lot of use. The definition of it is quite vague as you'd think that all one pagers are landing pages, which you easily could argue they are. This one pager by WordPress hosting up-comers Flywheel is exactly what we think a landing page is. It is a one pager that is not linked from the main site (there is no link to this page on their home page). It is basically a campaign/idea/experiment you've created to try engage with the user. I got a link to this page via a newsletter and I'm sure they're sharing it on social networks. Absolutely LOVE the technical jargon switcher, brilliant idea. These guys are going to do big things in the WordPress market, watch this space.