The Quick Cards plugin enhances directory navigation in Obsidian by displaying files in a directory as visually appealing cards. Each card showcases the note title, creation date, and a brief summary, making it easier to browse and manage notes. Users can open notes directly by clicking on a card or create new notes via a dedicated plus button. The plugin also supports automatic directory switching, adapting the displayed cards to the folder of the currently opened file. Additionally, the card appearance can be customized by modifying the included CSS file, allowing for a tailored visual experience.