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Comments are not one signal

A one-word reply, a question and an argument all add one to the same number. They are not the same event.

GrowthCamel research desk · 2026-10-04
Image — to addReading the replies properly rather than counting them/images/library/comments-signal.jpg · 1200 × 675 (16:9)Photorealistic editorial documentary photograph, shot on a 35mm full-frame camera with a fast prime lens, natural available light, shallow depth of field with a soft falloff, fine natural film grain. Warm muted palette of creams, oatmeal, warm greys, wood and skin tones. Real lived-in spaces with visible imperfection. Candid, unposed, caught mid-moment; subjects absorbed in what they are doing and not addressing the camera. Natural casting of ordinary-looking people of varied ages and backgrounds, ordinary clothes, no styling. A woman sitting cross-legged on a floor against a sofa, phone close, scrolling slowly with a small frown of concentration — reading replies rather than skimming them. One lamp, evening, a mug on the floor beside her. AVOID: no text, no lettering, no captions, no numbers, no charts, no graphs, no infographics, no UI mockups, no logos, no brand marks, no watermarks, no recognisable public figures, no stock-photo posing, no direct-to-camera smiling, no thumbs up, no handshakes, no glossy corporate office, no oversaturated colour, no HDR, no lens flare, no 3D render, no illustration.
In this story

Instagram counts comments among the interactions that feed ranking, and creators read the total as a quality score. The total is nearly useless on its own, because it adds together behaviours that mean opposite things.

Four things counted identically

The one-word reply. “This”, an emoji, a tag of a friend. Cheap, fast, and genuinely meaningful in one narrow way: tagging a friend is a share with extra steps. The rest is closer to a like.

The question. Someone wants more than the post gave them. This is the most useful comment you can get, because it is a map of what the post left out and therefore what the next post should be.

The argument. Disagreement, sometimes heated. Uncomfortable and often the strongest signal in the set, because arguing costs more than agreeing. Distinguish it from the next one carefully.

The bait response. A comment produced by a deliberate error, a provocation, or an unanswered question planted to force a reply. It counts the same and it means nothing about the content.

Bait raises the number and lowers what the number is worth.

Why bait is a bad trade

It works, briefly. An obviously wrong statement produces corrections, and corrections are comments. The problem is what it trains. An audience that learns your posts contain deliberate errors stops reading them as information and starts reading them as a game.

And it is self-limiting: the second time you use the same device, the people who fell for the first one recognise it. You have spent credibility to rent a number.

What to look at instead

Three readings that cost nothing:

  • The share of comments that are questions. High means the topic has depth you have not covered. That is a content pipeline, free.
  • The share that are one word. High with low saves and sends usually means the post was agreeable and not useful.
  • Replies between commenters. People talking to each other rather than at you is the hardest thing to manufacture, and the best sign the post found an actual audience rather than an impression.

The general shape of the problem

This is the same failure as engagement rate and views: a single number carrying several meanings answers no question cleanly. The repair is always the same — split the number until each piece answers one question, and accept that you now have three numbers to look at instead of one.

Sources

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