What to actually do with 9 to 20 slides

The data says go deep. The craft is making depth readable instead of exhausting. A working structure for a 9-to-20-slide carousel:

1. Cover slide: the hook. Slide one is the only thing the feed shows. Lead with the promise or the tension, not your logo. It earns the swipe or nothing else matters.

2. One idea per slide. A slide is a beat, not a paragraph. If a slide makes two points, split it into two. This is also how you reach 12 slides honestly: you are not padding, you are giving each idea its own frame.

3. A recap slide near the end. Once you are past 10 slides, a single "here is everything in one view" slide helps readers consolidate and is the most screenshotted, most saved slide you will make.

4. A call-to-action slide to close. They swiped to the end; you have their attention and goodwill. Ask for a follow, point to the comments, or link a resource. Do not waste the closer on "thanks for reading."

And when is a short carousel still right? When you have one quick framework to deliver and stretching it would dilute it. A crisp 5-slide carousel that nails a single point beats a 15-slide one padded to hit a number. The lesson is not "always make it longer." It is "do not stop at 8 just because you ran out of steam." If the substance runs to 14 slides, make 14.

For the full mechanics, designing in Canva or Figma, the 4:5 export, the PDF upload, see the companion guide, how to create a LinkedIn carousel post. And if you want to study real winning carousels instead of guessing, browse real winning carousels among 2M+ posts and filter by format to see how the deep ones are built, slide by slide.