Just install the extension and like magic you'll be able to access a list of sites that would normally be blocked. At the moment, you can access video-streaming sites like Netflix, Hulu, or Fox, and music-streaming sites like Pandora.
Additionally, you can vote on Hola's official Facebook page for the next sites you want to be unblocked - currently the top request is for the official HBO page.
Can you imagine being able to see the latest episode of Game of Thrones as it airs? With Hola Unblocker, geographic limits disappear.