Save-for-later service Pocket reported that it has seen 240 million total items saved to its platform during 2012, from 7.4 million followers. That represents growth of around 85 percent for the year, but the really impressive figure is the activity metric: 240 million saves adds up to more data synced to the service in 2012 than in the previous four years combined, during which there were 170 million total saves.

That these users spent their time saving "Oppa Gangnam Style" and a Vanity Fair article on Obama suggests to me that Pocket users are more interested in Instapaper-style usage (read it later or watch it later on a mobile device) than saving like Evernote or Delicious.

Saving services save some or all of an article for searchability.

Read-it-later services cache the video or article for viewing on video.