What is a hook on social media?

Why the hook matters

Feeds show only the start of a post before people decide to scroll on. Long captions are cut off after the first lines, carousels show only the first slide, and videos start playing mid-scroll. If the opening does not earn attention, the rest of the post is never seen, which lowers reach, watch time and engagement.

In video the window is short. TikTok’s ads help centre advises prioritising your hook in the first 6 seconds to boost engagement and watch time, and introducing your core message in the first 3 seconds for better recall.

Common types of hook

• A specific result: “We cut our posting time from 6 hours a week to 1.”
• A problem the reader has: “Your LinkedIn posts get views but no comments?”
• A contrarian claim: “Posting every day is hurting your reach.”
• A promise of a list or steps: “5 captions that turned browsers into buyers.”
• A question or callout to one audience: “Restaurant owners, this one is for you.”
• Visual surprise in video: movement, a before-and-after or an unexpected first frame.

How to write and test hooks

Write the body first, then write several opening lines and pick the clearest. Keep it concrete (numbers, names, outcomes), cut warm-up words like “So” or “I wanted to share”, and make sure the post delivers what the hook promises. A misleading hook gets the click but loses the reader, and the platform notices when people leave early.

The best hook differs by network, so write one for each version of a post. In Postprism you write the post once and tailor each network’s version yourself or with Enhance with AI, which returns a version for every platform you selected.