My Expansive Life › Blog › LinkedIn Strategy
How to Comment on LinkedIn to Build Authority (Not Just "Great Post")
By Dr. Nkem Ezeamama · · 5 min read
Here is the thing almost nobody tells beginners: on LinkedIn, commenting will grow your visibility faster than posting will — especially in your first ninety days, when your own posts have almost no audience to land in.
A thoughtful comment on a post with 40,000 views puts you in front of 40,000 people. Your own post, early on, might reach two hundred. The maths is not subtle.
Why commenting works
When you comment on someone's post, your name and headline appear underneath it for everyone who reads that far. If the comment is good, some of them click. It is borrowed reach, and it is entirely free.
It also feeds back into your own posts. Commenting warms up your presence in other people's networks, which means more of them see your next post — the first-hour signal that the algorithm weights most heavily.
What a useless comment looks like
"Great post!" "Well said." "100%." "Thanks for sharing."
These are not rude. They are simply invisible — nobody reads them, nobody clicks them, and they teach the platform nothing. Worse, a feed of them makes you look like someone who engages professionally rather than genuinely.
What a good comment does
A comment that earns you attention does at least one of three things:
- Adds a piece the post left out. "This matches what I see in hospital systems — the extra wrinkle is that the approval chain adds six weeks."
- Disagrees with something real. Respectfully, specifically, with a reason. Thoughtful disagreement is memorable and it starts conversations.
- Extends it with a concrete example. Your own numbers, your own case, your own outcome.
Length matters less than substance, but two to four sentences is the range where most good comments live. One line rarely says enough. Ten lines is a post you should have written yourself.
A simple structure
When you are not sure what to write:
- React to something specific in the post — quote or reference an actual line, so it is clear you read it.
- Add your angle — what your experience says about it.
- Leave a door open — a question, or a point the author might want to respond to.
That last step is what turns a comment into a conversation, and conversations are where connections actually start. Which is a far better opening than a cold request — see how to send a connection request that gets accepted.
Who to comment on
Build a list of twenty to thirty accounts in your field and work it daily. Mix three tiers:
- Large accounts in your industry, for reach.
- Peers at your level, for genuine relationships and reciprocity.
- Your ideal clients or collaborators, so the people you most want to know see your name regularly.
Twenty minutes a day across that list is enough. This is the daily engagement system, and it is more responsible for early growth than anything else you will do.
Timing
Comment early. A comment posted in the first hour, while the post is being actively tested and read, gets seen by far more people than the same comment left the next morning. Set aside the twenty minutes when your niche is most active.
Two comments, side by side
The post: a hospital executive writing about why staff retention initiatives keep failing.
The invisible version: "So true! Retention is such a challenge right now. Thanks for sharing this."
The version that gets clicked: "The part that matches my experience is the exit interview timing. We were surveying people who had already mentally left, so we kept getting polite answers. Moving to a six-month check-in surfaced the scheduling complaints a year before they became resignations. Did you find the same, or was your signal somewhere else?"
The second one took ninety seconds. It demonstrates expertise without claiming any, it gives the author something to reply to, and anyone in that comment section who cares about retention now knows there is someone worth following.
Common questions
How many comments a day is enough?
Five to ten thoughtful ones beats thirty rushed ones. Twenty minutes is the realistic daily budget for most working professionals, and it is sufficient.
Does commenting help if my profile is not finished?
It works against you. Commenting sends people to your profile, so a half-finished one wastes the attention you just earned. Fix the headline first — it takes fifteen minutes.
Should I comment on posts from people far more senior than me?
Yes, and it is one of the few genuinely level playing fields on the platform. A specific, useful comment gets noticed regardless of your title. Vague agreement does not, regardless of anyone's title.
What not to do
- Do not pitch. A comment section is not a sales channel and everyone can tell.
- Do not paste the same comment across posts. It is obvious and it reads as automated.
- Do not argue to win. Disagree to add, then let it go.
- Do not tag people for attention. Tag someone only when they genuinely add to the thread.
LinkedIn's help centre covers the platform mechanics; the judgement is the part that takes practice.
Start with twenty minutes a day for two weeks and watch what happens to the reach on your own posts. The daily engagement system is built out in full — including the account list and comment templates by category — inside LinkedIn Unlocked.