Posting the same content everywhere is the fastest way to work nowhere. Each network has developed formats its algorithm favours, because they serve its own objective — holding attention, provoking discussion, or driving people outward.

Instagram: the carousel still dominates

The carousel remains the highest-yield format for engagement, for a mechanical reason: it requires an action. Every swipe extends time spent, and Instagram can re-show a carousel to a follower who didn't finish it, displaying a different slide. No other format offers that second chance.

Short video brings reach among non-followers but converts to follows less well than the carousel. The combination that works is often video to be discovered, carousel to be followed.

The single image keeps a role: it's the fastest format to produce and suits news, announcements and strong visuals that need no explanation.

LinkedIn: text is still king

This is the only major network where text alone remains the top-performing format. A well-written post with no image circulates very well — because LinkedIn favours what triggers comments, and written reasoning provokes more reaction than a visual.

The PDF document, displayed as a native carousel, is the second most effective format. It holds attention for a long time and suits methodological content.

One point to know concerns external links. LinkedIn has never confirmed a penalty, but the observation shared across many accounts is consistent: a post containing an outbound link circulates less. The widespread practice is to put the link in the first comment.

TikTok: the first three seconds decide

On TikTok, format reduces almost entirely to the hook. The platform measures retention second by second, and a mass drop-off in the first three seconds condemns a video before it has been distributed.

Formats that hold share one characteristic: they immediately state what you'll gain. A demonstration that starts with the result, a counter-intuitive claim, a direct question.

Optimal length varies by topic, but one principle stays stable: a twenty-second video watched to the end beats a two-minute video abandoned at fifteen seconds. Completion rate weighs more than absolute duration.

Pinterest: vertical, no debate

Pinterest is the least ambiguous network. The 2:3 vertical format (1000 × 1500 pixels) occupies maximum space in a mosaic feed, and that occupancy translates directly into clicks.

Content that works promises a reusable method or inspiration: lists, steps, before/after, curated selections. Text overlaid on the image isn't just tolerated but expected — it usually carries the promise.

An important particularity: Pinterest works like a search engine. Descriptions are indexed, and a well-described pin keeps receiving traffic months after publication.

Twitter/X: short text and the thread

Two formats coexist. The short, sharp post, which lives a few hours and rests on phrasing. And the thread, which lets you develop an argument and remains the most reshared format.

Images markedly increase stop rate in the feed. A screenshot, a simple chart or a formatted quote is enough to slow scrolling.

Summary

  • Instagram — carousel for engagement, short video for discovery
  • LinkedIn — text alone, then PDF documents; link in the comments
  • TikTok — short video with a three-second hook
  • Pinterest — 2:3 vertical image with overlaid text
  • Twitter/X — short text or thread, image to stop the scroll

How to adapt without redoing everything

These differences don't require creating five distinct pieces. They require adapting one idea into five shapes.

A six-step method becomes: a LinkedIn post developing the most counter-intuitive step, an Instagram carousel covering all six, a TikTok video on the mistake everyone makes, a Pinterest infographic pin, a Twitter/X thread with the full structure.

The substance is identical. Only the form adapts to what each platform knows how to distribute.