Why the last line deserves effort
Threads is built around conversation, and Meta's own creator guidance says replies account for almost half of the views on the app. Two consequences follow. Replies under your post give it more to show people, and the replies you leave elsewhere are one of the main ways strangers find you.
Buffer analysed over 128,000 Threads posts and found that posts where the creator replied to comments had about 42% higher engagement on average. Buffer is careful to call that a correlation, not proof of cause, and so are we. It is still a reasonable working assumption: a post that ends with an easy question, and an author who answers, gives a conversation room to happen.
Match the CTA to the post
The most common mistake is using the same closing line on every post. A question that suits an opinion post feels forced under a tutorial. Pick the ask that fits what the reader just read.
- Opinion post: ask where the reader stands. "Agree, or is there a case where daily posting still makes sense?"
- How-to post: ask about their attempt. "If you try the three-sentence version, tell me what your reply rate does."
- Personal story: ask for the parallel experience. "What was the first client you undercharged, and how did you notice?"
- List post: ask for the missing item. "What would you add as number six?"
- Announcement or launch: ask a practical question, not for praise. "Which of these three features would you use first?"
Four rewrites
Before: "Let me know your thoughts!" After: "Would you ship this with the bug documented, or hold the release?" The first leaves the reader to invent a question; the second hands them one with two clear answers.
Before: "Follow for more tips like this." After: "Next week I'm posting the email template itself. Which part do you want explained first: subject line or opening?" Asking for a follow gives nothing in return; asking about the next post gives a reason to come back.
Before: "Comment below if you agree!!" After: "Where does this break down? I can think of one case, curious if you see others." Agreement is a dead end. Inviting a counterexample starts a conversation.
Before: "Thoughts? Share with someone who needs this." After: "Which of these five do you already do?" Two asks in one line dilute each other. One concrete question is easier to answer.
Pro tip
Put the question on its own line, separated from the body. Readers who skim still see it, and it is clearly addressed to them rather than part of the argument.
What Meta has said about engagement bait
Meta's Transparency Center lists engagement bait among the low-quality content it distributes less on Facebook and Instagram. That page does not mention Threads, and we have not found a written Threads rule. What exists for Threads is a post by Adam Mosseri from October 2024 saying Meta had seen an increase in engagement bait on the app and was working to get it under control.
So treat the familiar formats with caution: "Like if you agree", "Comment YES", "Tag a friend who needs this". The difference between bait and a good CTA is not whether you ask for a reply. It is whether the reply carries any content. "Comment YES" asks for a reaction to the request itself; "Which of these would you try first?" asks for an opinion about the post.
After the replies arrive
A CTA is a promise to show up. Answer with something the reader can respond to again (a follow-up question, an example, a counterpoint) rather than "Thanks!". Second-level replies are where a post becomes a conversation.
If you ask people to share their biggest problem with something, read every answer. Those replies are the cheapest audience research you will ever get, and they are often the topic list for your next two weeks of posts.
Sources
Platform facts in this guide link to Meta's own documentation, its newsroom or established tech press. Advice without a source is our editorial judgement, not a Meta rule.
- Meta — Threads creator best practices (creators.instagram.com)
- Buffer — Replying to your Threads comments can boost engagement by 42% (Feb 2026, 128,000+ posts)
- Meta Transparency Center — Reducing the distribution of problematic content (Facebook and Instagram)
- Adam Mosseri on Threads — engagement bait is increasing and Meta is working on it (Oct 2024)
Ready to apply this?
Generate captions with strong CTAs
Frequently Asked Questions
Does every post need a CTA?+
No. A strong opinion often invites replies on its own, and a forced question under it can feel needy. Use explicit CTAs where you want the reader to stop and contribute, such as tutorials, lists and requests for experience.
Is "reply with a keyword and I'll DM you the link" engagement bait?+
It asks for a reply that carries no content, which is the pattern Meta calls engagement bait on Facebook and Instagram and which Mosseri has said Meta is working against on Threads. Meta does not publish how individual posts are treated. If you want to share a resource, linking it directly in the post is simpler and avoids the question.
Should I answer every reply?+
Answer the ones you can answer well. A thoughtful reply to ten comments does more than a one-word reply to fifty. If a post draws more replies than you can handle, pin or highlight the best answers in your own follow-up.