The Quick Open plugin enhances Obsidian by allowing users to quickly open files, execute commands, or select tags and suggestions within any modal using keyboard shortcuts. By pressing a modifier key (Command on macOS, Ctrl on Windows/Linux) and a number, users can streamline their workflow and navigate through modals such as the quick switcher, command palette, search, tags, and aliases with ease. This functionality extends to advanced operations like switching workspaces or executing slash commands, making it an invaluable tool for efficient note management and organization.