User blog comment:Xean/Slick Skin and Wordmark Tips/@comment-367711-20110730111539/@comment-2093602-20110731113902

This method of Font Importing can be used to use fonts on your webpage that do not need to be installed on the users computer.

Normally, for a font to work, a user must have it installed on his computer (which is why usually alternatives are given). With this there is no need for that.

It's a fairly new technique though, and it may not work on older browsers.