The first 125 characters decide everything
Instagram collapses captions behind a "more" link at roughly 125 characters. TikTok shows even less before the text overlaps the video. Everything after that point is only read by people who were already interested, so the hook has to land inside the visible window.
The most reliable hooks are specific rather than clever. "Three things I got wrong on my first solo hike" outperforms "Hiking tips you need to know" because it makes a concrete promise and implies a story. Vagueness is the most common reason a caption dies.
Keep the hook on its own line. Line breaks are the cheapest readability upgrade available on both platforms, and a wall of text reads as an advertisement even when it is not one.
Why hashtag stuffing stopped working
Instagram has repeatedly reduced the reach value of hashtags, and using thirty broad tags now signals low quality more often than it signals relevance. The accounts that still benefit use fewer, more specific tags.
The tiered approach in this tool reflects how discovery actually happens. Broad tags with millions of posts put you in a feed you cannot compete in. Niche tags with fifty thousand to five hundred thousand posts are where a small account can realistically reach the top of a feed. Community tags are where the same people keep showing up, which is where followers come from.
Twenty tags across three tiers is a workable default. Fewer if your account is established, more if you are new and still finding your audience.
Matching the caption to the goal
If you want comments, ask a question the audience has an opinion about. Questions with an obvious answer produce nothing. "Which one would you pick?" works. "Do you agree?" does not.
If you want saves, the caption should contain something worth returning to: a list, a checklist, a set of steps. Saves are weighted heavily because they signal genuine value rather than a passing reaction.
If you want followers, give a reason to expect more. One line naming what you post about is more effective than a generic "follow for more".
If you want sales, be direct about it. Vague soft-selling captions convert worse than a plain statement of what you sell and where the link goes. Audiences tolerate a clear pitch far better than a hidden one.
Do not forget alt text
Alt text is written for screen readers, but Instagram also uses it in its own search. A one-sentence description of the image, under 125 characters, improves accessibility and gives the platform more to index. It takes ten seconds and almost nobody does it.