The Playstation Network, or PSN for short, allows Downloadable Content to be viewed and downloaded through Playstation's official in-built store. The store acts just like a web browser and lists game demos, trailers, add-on packs, themes and wallpapers.
A Playstation 3 can connect directly to the Playstation Network over the internet once a Playstation Network account has been created. This account will save all a users download information and billing details so that any purchases can be downloaded in the future at no extra cost.