The Smart Link Alias plugin enhances how links to Obsidian notes are displayed. By allowing users to set custom aliases for note titles, it provides flexibility in how links appear across notes. Users can define different versions of a note's title, such as abbreviations or full titles, and switch between them easily. This is done by adding YAML frontmatter with properties like 'full-title' and 'short-title' and using specific link display formats like 'short', 'full', or 'long'. This plugin is ideal for users who prefer a more organized and customized link system within their Obsidian vault.