An empty input box alone leaves people unsure what's even allowed to ask. Showing a handful of concrete example prompts on the first screen lets someone tap one to send it as the first message, or at least get a feel for "oh, this is the kind of thing it's for."
Generic copy ("Ask me anything") does far less work than a specific, plausible sentence ("Find risky clauses in this contract"). Picking examples that overlap with the tool's actual strengths also quietly explains what the product is for, right at first impression.
Tapping a card sends it as the conversation's first message, and the empty state gives way to the normal chat screen. It looks similar to suggestion chips, but chips propose a "next" after a conversation is already underway, while this proposes a "first" before one has started at all.
When to use
Use it on the first screen of a general-purpose conversational tool where the user has to decide what to even ask. Less needed for a single-purpose tool whose use is already obvious, like a pure translator.