Twitter Cards are a feature that allows users to attach rich media to their tweets. This enhances the way links are displayed, making them more engaging and informative. There are several types of cards, including summary cards, photo cards, and player cards, each designed for different types of content. When a user shares a link, a Twitter Card can automatically generate a preview that includes images, titles, and descriptions. This helps to attract more attention and encourages users to click on the link, ultimately improving interaction and visibility on the platform.