I made a video tutorial for the SnippetManager especially for beginners, which focuses on creating new snippets and how to use placeholders.
(!) Its about version 0.9 and it still covers all the basic functions, but you may also want to read the help file to find out about all the improvements and new features in the latest version.
You can watch the tutorial here:
or in better quality and with selectable chapters here: (min. screen res 1280×768)