You can write the most profound career advice or the most detailed product case study in the world, but if nobody clicks "...see more" within the first 1.5 seconds, your post will die in algorithm obscurity.
1. Why 80% of Post Success Depends on the Hook
LinkedIn's algorithmic feed scoring system measures two primary dwell signals:
- Dwell Time: How many seconds a user lingers on your post as it sits in their viewport.
- Expansion Click Rate (CTR): The percentage of impressions that click the "...see more" cutoff button.
When an expansion click occurs, LinkedIn's ranking model receives a strong positive signal indicating that the content has generated active reader interest. That post is then distributed into second- and third-degree network feeds.
2. The Anatomy of the 210-Character Mobile Cutoff
On mobile devices, LinkedIn truncates text after approximately 210 characters or three physical lines.
Critically, an empty line (a paragraph break) counts as an entire vertical line of text. If your post begins with:
[Empty Line]
Line 2: We just finished our Q3 roadmap...
LinkedIn will cut off right after Line 2! You have burned 50% of your visible viewport space on an empty line without delivering any curiosity or value.
3. 5 Battle-Tested Hook Formulas with Examples
Formula 1: The Contrarian Stance
Challenge an accepted industry dogma or popular misconception.
(Here is why the first $500k in ARR must be sold by the CEO):
Formula 2: The Specific Metric Breakdown
Anchor the post with real numbers and credible timelines.
Zero paid ads. Zero giveaways. Just one 30-minute daily habit:
Formula 3: The Vulnerable Failure Story
Begin at the lowest emotional or professional point.
It felt like our agency was finished. Instead, it was the best thing that ever happened to us:
Formula 4: The Tactical Resource Curation
Save the reader dozens of hours of research.
95% of them are useless wrappers. These 6 actually save 10+ hours per week:
Formula 5: The "Unpopular Truth"
Say what everyone in your industry thinks but nobody dares post.
If your team lacks written documentation, remote work just amplifies chaos.
4. Formatting the Hook: Bolding & Line Break Mechanics
Format your hook using our ⚡ Bold Hook quick button to bold the very first sentence. The contrasting bold weight acts as an anchor point that halts the rapid downward thumb scroll on mobile feeds.
Immediately follow your bold sentence with a second line that deepens the curiosity gap before the cutoff fold.
5. How to Test Your Hook with a Feed Simulator
Never guess where your hook will cut off. Paste your draft into our Live LinkedIn Feed Simulator and toggle between Desktop and Mobile views. The simulator automatically calculates character length and flags whether your crucial hook sentence fits safely before the fold.