The Better Heading Hierarchy plugin adds visual guide lines to help users quickly understand the structure of their markdown headings. By drawing connecting lines between headings of different levels, it makes the document hierarchy clearer and easier to scan, especially in longer notes with multiple nested sections. The plugin works best with the default theme and supports additional author-styled CSS for enhanced visuals when paired with specific fonts. This makes it particularly useful for users who work with deeply nested outlines or want a more structured editing experience.