[[Wikia:Quickcreate-desc/en]]

First, note that this is an extension description message, shown on Special:Version.

With that in mind, here's what Bartek meant here: the extension adds a button that lets users easily create a new page, if they are logged in but if they are not (anonymous user), it first asks that they log in.

Hope that's clear. Not sure how to reword it, suggestions welcome.

"Adds a create-new-page button with conditional login request to anonymous users"

Changed in code.