The Editor Autofocus plugin automatically focuses on the editor window when a new note is opened. It streamlines the process of note creation by selecting the first heading if it exists, allowing users to rename the title instantly without manually clicking. This behavior is particularly useful when combined with plugins that synchronize filenames with note headings. The autofocus feature is applied only when a note contains fewer than three lines, ensuring a smooth workflow for quickly jotting down ideas and organizing notes efficiently.