Hook: what it is, how to write one and how to measure whether it worked

A hook is the part of the content with a single job: keep the person from leaving. In under three seconds, it answers the only question a scroller asks constantly without noticing: "is this for me?".

The most common confusion is treating a hook as a catchy phrase. It is not. A hook is a specific promise made to a specific audience. "Did you know there is a better way?" is a catchy phrase and holds nobody. "If your reach dropped after you changed subject, this explains it" is a hook, because it names the situation of the person on the other side.

That changes the order of work. A hook is not the last thing you write to add polish. It is the first, because it forces you to decide who the piece is for.

In video, many people write only the spoken line and then wonder why retention did not move. A hook happens across three simultaneous channels, and they have to agree.

• Verbal. What gets said in the first seconds. It has to start on the subject, with no greeting and no introduction.
• Visual. What appears on screen. Movement, expression, an unexpected object or on-screen text. A video that opens with a person standing still facing the camera loses to one that opens with something happening.
• Sonic. Clean audio at a levelled volume. A video quieter than the rest of the feed gets skipped before a single word is processed.

On-screen text deserves its own paragraph: a large share of consumption happens with the sound off. If the promise only exists in the spoken line, it does not exist for the person on the train.

This is not a list of formulas to copy, it is a set of mechanisms.

• Named situation. Describing the audience's situation precisely. "You post every day and reach will not move."
• Counterintuitive. Contradicting a common belief in the niche. It works because it breaks the scroller's prediction.
• Specific mistake. Naming an error the person probably makes. It sells because it touches risk, not benefit.
• Open loop. Announcing that an answer exists and delivering it later. Careful: drag it out and it becomes stalling, and stalling kills retention.
• Concrete result. A real, verifiable number. Without a real number, do not use this type.
• Immediate demonstration. Showing the end result in the first seconds and then explaining how to get there.

What almost never works: greetings, personal introductions, historical context, "before we start, subscribe". All of it spends the decision window on information that means nothing to someone who has not decided to stay.

A hook is one of the few things in content you can measure almost cleanly, because its effect happens before everything else.

• Hook rate: how many people got past the first seconds. The direct measure of the hook.
• Retention curve: where the drop happens. Falls at second 2 and the problem is the hook. Falls at second 15 and the problem is the development.
• Non follower reach: a weak hook cuts delivery to non followers before it cuts anything else.

The test worth running: take a piece that underperformed, change only the hook and republish a few days later. With everything else held constant, the difference is attributable. Changing hook and format at once turns the test into an opinion.

• Promising what the content does not deliver. It raises retention in the first seconds and destroys everything after, plus it generates negative signal.
• A hook that is too generic. It works for everyone, therefore it speaks to nobody.
• Taking too long to start. A second of intro is a second of audience gone.
• Illegible on-screen text. Thin type, low contrast, or placed under the app interface.
• Copying a viral hook without its context. That hook worked because it matched that audience and that content. On its own, it is just a strange sentence.
• One hook for the whole funnel. Someone who has never heard of you needs a different hook from someone who has followed you for months.

• You can tell who the content is for from the first sentence.
• The promise is specific, not generic.
• The content delivers what the hook promised.
• It works with the sound off, because on-screen text carries the promise.
• It starts on the subject, with no greeting and no intro.
• On-screen text is legible and outside the area covered by the interface.
• I measured hook rate, not just total views.