What is a comment-to-DM funnel, and how do you set one up?

There's a pattern you see all the time on Instagram: “Comment LIST and I'll DM it to you.” That simple line actually builds a small funnel. This post explains how the funnel works, what a good setup looks like and what to be careful about.

The funnel has four steps

1. Video: You give viewers something valuable and ask for a keyword at the end.
2. Comment: Someone who's interested comments that word.
3. DM: You send them the content you promised, in a personal message.
4. Click: They open the link in the message — a guide, a product page, a sign-up form.

What makes this work is that the person who comments has shown interest themselves. Your message isn't an ad; it's the answer to something they asked for.

Choosing a good keyword

• Keep it short — one word. Like “GUIDE”, “TEMPLATE” or “LIST”. Long phrases get mistyped.
• Tie it to the episode's topic. The word should remind viewers what they'll get.
• Use a different one for each episode. Then you can see how many requests each episode brought in.
• Allow for variations. People will type “guide”, “Guide” or add an emoji. Matching should tolerate case and accent differences.

The DM itself

The DM should keep the promise from the video straight away. A good DM:

• Opens with a short greeting and reminds them why you're writing.
• Delivers the promised content or link in the first message.
• Suggests one next step, if any — without bombarding them with questions.

Not sending what you promised, or turning the DM into a sales pitch, loses trust fast.

A public reply to the comment

Many accounts also reply publicly to the comment: “Sent — check your DMs.” It helps the person notice the message and shows other viewers that the system works.

Manual or automated?

With a handful of comments, you can run this by hand. But when an episode gets more attention than expected, replies slow down and opportunities slip. That's where automation tools come in: when they see the keyword, they send the DM for you.

If you automate, make sure the tool uses Instagram's official API and follows the platform's messaging rules. Unofficial methods can put your account at risk.

You can't improve what you don't measure

For each episode, look at:

• How many people commented the keyword?
• How many DMs were sent?
• How many people opened the link?

These numbers tell you which topics and which CTA lines work. You can shape the next episodes of your plan around them.

How it works in SeriHook and ReplyHook

SeriHook drafts a CTA keyword and a DM for every episode. When the episode goes live, that keyword becomes a rule tied to the video in ReplyHook, our sister product. If you don't use ReplyHook, you can copy the DM text from the panel and send it yourself.