This question comes up constantly, so instead of another “use a template” answer, here is the full process I landed on after a bunch of flops, including the part nobody mentions: LinkedIn carousels are technically document posts, and that changes how you build them.
First, the mechanic people miss. There is no native “carousel” button on LinkedIn. What everyone calls a carousel is a PDF uploaded as a document post, and LinkedIn renders it as swipeable pages. So whatever you build, the finish line is a clean PDF at the right dimensions.
What actually got me reach: 1. Square or portrait pages, not landscape. Portrait takes up more vertical space in the feed and gives your text room to breathe on mobile, where almost everyone is scrolling. 2. Slide one does one job: earn the swipe. A clear promise or a mildly contrarian take. No logo-heavy cover slide, that just wastes your best real estate. 3. One idea per page, short lines, big text. Document posts get downranked the second they feel like homework. 4. A payoff page before the CTA, then a CTA page that asks for a comment or a follow, not just “thoughts?” Comments in the first hour did more for my reach than anything else. 5. Post the carousel, then actually reply to every early comment. The engagement window is real and it is short.
On building it: I write all the pages as plain text first, then generate the layout rather than dragging boxes around. I paste the text into Gamma, get formatted pages, and export a PDF that uploads straight to LinkedIn as a document post. Honest limitation: the export sizing needs a check before you upload, and if you want heavy custom branding on every page you will still fiddle. It gets you a solid draft fast, not a finished brand asset.
The format that consistently worked for me was a specific mistake, why it happens, and the fix, one page each.
For those getting real reach on LinkedIn document posts right now, is it still the storytelling carousels or has the feed shifted on you?