The Enhance Copy Note plugin simplifies duplication of notes and folders in Obsidian by adding convenient commands to the command palette and file menu. It features a 'Copy active note' command that replicates the functionality of the file explorer's 'make a copy' option, allowing users to quickly duplicate the currently active note. Additionally, the plugin provides a 'Copy folder' command for duplicating an entire folder along with its contents, streamlining workflows that involve creating backups or reusing note structures.