Coda offers three types of clips: Global, site-specific, and mode-specific.
Global clips work in any type of text document. Site-specific clips will only be available while the corresponding site is open. Mode-specific clips are only available in text documents belonging to a particular mode (such as HTML or CSS).
Coda comes with a few useful clips by default, including a short Lorem Ipsum excerpt for boilerplate text, and a simple HTML page structure in the HTML mode.
See also: Using clips, Syncing clips