Present information in a progressive way

Cards are meant for digestible pieces of content — users can open them to know more. It's an excellent example of the progressive disclosure technique that presents information or features in a progressive, step-by-step way. Firstly, it helps not overwhelm novice users with bulks of content and enhances the process of system learnability. Secondly, the interface looks more organized and clear.

Keep the supporting body text short and truncate it with three dots — it gives a feeling that there's something more to explore and invites users to continue reading.