Ask the agent to preview an ad and it renders a realistic Facebook and Instagram mockup in a side panel: feed and story formats, with your creative, copy and link in place. Use it to sanity-check an ad before launch, or to show a teammate or client what something will look like without opening Ads Manager.
How to use it
In chat, ask something like "Preview this creative as a Meta ad with the headline 'Built by YC founders'", attaching the image if it is not already in the conversation.
Or mention an existing ad with @ and ask to see its preview.
Flip between placements in the preview panel.
Previews follow Meta's real layout rules, so long headlines and truncated text show up the way they will in the wild. It is much cheaper to catch that here.