The Suffusion theme used to be armed with a bunch of shortcodes prior to version 4.4.8.
So what happens when you update Suffusion or change themes? This plugin ensures that your content stays as it is and lets you switch with your mind at ease.
Users of Suffusion get some added flexibility with the plugin in terms of more customizability.
For a list of all available shortcodes and their usage, see here: http://aquoid.com/news/themes/suffusion/shortcodes-to-enhance-functionality/