What Should You Post on LinkedIn?

Post about the topics your audience already rewards you for, in the formats that perform best for you, then validate the draft before publishing. Flux answers "what to post" with your own data: Topic Insights show which themes drive the most engagement, the Content Type Breakdown shows which formats win, and suggest_angles turns a winning topic into specific post ideas. Because Flux measures engagement (likes, comments, and shares), not impressions, every recommendation is grounded in what your audience actually reacted to.

What you'll learn

Why generic "what to post" advice fails and what to use instead
How to find your highest-engagement topics with Topic Insights
Which post formats earn the most engagement, for you and across LinkedIn
How to turn a winning topic into specific post angles with suggest_angles
How to score a draft before you publish so you post with confidence
The full workflow from topic to published post

Why does generic "what to post" advice fail?

Most "what to post on LinkedIn" advice is one-size-fits-all: share insights, tell stories, ask questions. None of it accounts for your specific audience or your track record. A topic that earns 200 reactions for a design leader can fall flat for a finance executive, because their audiences want different things.

Flux replaces generic advice with evidence from your own posts. Instead of guessing, you start from the topics, formats, and angles that have already worked for the people who follow you. The rest of this guide walks through the Flux features that surface that evidence.

How do you find topics worth posting about?

Start with Topic Insights, which ranks your most-frequent topics by engagement so you can see what your audience responds to. The dashboard topics chart and the get_topic_insights MCP tool both surface the same data: your recurring themes, the unigrams and bigrams behind them, and how each one performs against your own baseline.

Each topic comes with three numbers that make the decision easy. You get avg_engagement (the average reactions, comments, and shares for posts on that topic), vs_baseline (how that compares to your typical post, e.g. "leadership: 1.4x above your baseline"), and a sample_post_url so you can reread the post that worked.

A topic at 1.4x your baseline is a signal to post more on that theme. A topic below 1.0x is one your audience tolerates but doesn't reward, so deprioritize it. Topic Insights returns both your top unigrams (single words like "hiring") and bigrams (two-word phrases like "remote work"), which often reveal more specific angles than the broad theme alone.

Which post format should you use?

Format matters as much as topic, and the Content Type Breakdown chart shows your engagement by format: text, image, video, document/carousel, article, and poll. Lead with your own breakdown, because the format that wins for you is the one to repeat.

Across 25,150 Flux user posts, the median engagement by format looks like this:

Documents / carousels: 55 engagements (the highest)
Image: 42
Video: 33
Text: 19
Article: 12
Poll: 10

Documents and carousels lead by a wide margin, but your own data may tell a different story. If your text posts consistently beat your carousels, trust your breakdown over the benchmark. Use the LinkedIn-wide numbers as a starting hypothesis and your Content Type Breakdown chart as the verdict.

How do you turn a topic into specific post ideas?

Once you've picked a winning topic, suggest_angles generates five concrete angles built from your top-performing posts on that theme. You pass it a topic, and it pulls your relevant high-engagement posts as context so the suggestions reflect what's already worked for you, not generic prompts.

For example, suggest_angles({ topic: "hiring" }) returns five data-informed angles drawn from your best hiring posts. You can scope the call to a specific profile or collection when you manage more than one account or want ideas tied to a particular audience.

Each suggest_angles call costs 5 credits, so reach for it once you've already narrowed to a topic worth developing rather than spraying it across every idea. The output is a shortlist of angles specific enough to start writing from immediately.

How do you know a draft will perform before you post?

Write the post, then run it through score_draft or the Score My Post page in the app to get a predicted engagement percentile before you publish. Scoring is free, so there's no reason to post blind.

The score is backed by an OLS regression model with detrending and recency weighting, which means it accounts for your performance trend over time and weights recent posts more heavily. You get a predicted percentile, a factor breakdown showing what's helping or hurting, similar past posts for comparison, and concrete improvement suggestions.

Treat a low score as a prompt to revise, not a reason to scrap the post. Adjust the hook, tighten the format, or lean harder into the winning topic, then re-score until the prediction lands where you want it.

The workflow: from topic to published post

Put the four features together and the "what to post" question becomes a repeatable loop:

Open Topic Insights and pick a topic above your baseline.
Run suggest_angles on that topic to get five specific angles.
Choose an angle and write the draft, using your best-performing format.
Run score_draft to get a predicted percentile and improvement notes.
Revise and re-score until the prediction is strong, then publish.

This loop replaces "what should I post today?" with a short, evidence-backed sequence that starts and ends with your own engagement data.

Frequently asked questions

Does Flux tell me what to post based on impressions?

No. Flux analyzes engagement (likes, comments, and shares), because impressions aren't reliably available across LinkedIn. Every recommendation is grounded in what your audience actually reacted to, which is a stronger signal of resonance than a view count.

What's the best format to post on LinkedIn?

Across 25,150 Flux user posts, documents and carousels earned the highest median engagement (55), followed by images (42) and video (33), while text and polls trailed. But your own Content Type Breakdown is the real answer, since the best format depends on your audience.