Carousel cover slide

The cover slide is the first slide of a carousel — the only one that appears in the feed before a viewer decides to swipe. It is functionally the carousel’s hook line in visual form.

A cover slide does two jobs: deliver a hook that promises something specific, and visually punch hard enough to stop the scroll. The hook is text; the punch is composition. Cover slides that fail one job typically fail the other — generic copy on a generic layout gets scrolled past instantly.

The conventions that work: a single short headline (not a list title), heavy contrast, restrained color, and a typeface large enough to read at thumbnail size. The conventions that fail: "5 things you need to know about X," "Save this for later," stock photography, more than three colors.

The cover slide alone decides whether the rest of the carousel gets read. Every other slide can be perfect and it does not matter if no one swipes. Cover-slide design is the single highest-leverage decision in carousel production.