How to Use Keywords in Instagram Ads Comments

Paying to boost a reel and then leaving the comments unanswered is paying for leads and throwing them away. Each "price?" under a boosted post cost you money to generate. Set an Instagram ads comment keyword before the boost goes live, and every commenter gets your offer by DM in about a second. Viralyze handles the reply so the ad budget converts into contacts, not just views.

Do keyword automations work on boosted posts?

Yes, when you boost an existing reel or post from your own Business or Creator account. The boosted version is still the same post on your profile, so a comment on it is a comment Viralyze can see and reply to through the official Instagram API.

The important order is: create the automation first, then boost. If you boost first and add the keyword later, the early comments are missed.

Why does the keyword matter more on paid reach?

Because boosted reels reach people who have never seen you. A cold viewer will not DM you first, but they will type a single word under a post if the post tells them to.

Put the keyword in the caption, in the on-screen text and in the last two seconds of voice-over. "Comment GUIDE and I will send it to you" should be impossible to miss.

A setup for a boosted lead magnet

Say a financial educator is boosting a reel on "3 mistakes with your first SIP" and wants emails.

1. In the Viralyze app, create a lead magnet: a one-page PDF checklist that asks for an email before download. 2. Open an automation on the reel, keyword "GUIDE", plus "checklist" and "pdf" for people who paraphrase. 3. Write the DM: "Here is the SIP mistakes checklist. Pop in your email and it downloads straight away." 4. Turn on the public reply so the thread fills with "Sent you a DM 💌". 5. Schedule auto-pause for the day the boost ends, or after 2,000 DMs if the budget is capped.

Now every email collected is a contact with the reel as its source tag.

Should I use the follow-gate on an ad?

Usually yes, because the audience is cold and a follow is cheap to ask for. Viralyze nudges the commenter up to three times to follow before sending the link, and people who already follow get it immediately.

The trade-off is a slightly lower delivery rate in exchange for followers who will see your organic posts for free next week. For a pure sales ad with a checkout link, you might switch it off and take the sale.

How do I know if the boost was worth it?

Open the per-automation funnel: comments, matched, delivered, clicked, signed up. Compare the signed-up number against what you spent on the boost.

If 400 people commented, 380 matched and 60 signed up, you have a cost per email you can defend. If comments are high but matched is low, people are typing something other than your keyword; add their words to the list.

Can I run different keywords on the same boosted reel?

Yes. Different keywords can send different replies, so "GUIDE" delivers the free checklist and "COURSE" delivers the paid course checkout. One boost, two offers, and the contacts list shows which one each person chose.

Keywords are not case-sensitive and cope with typos, Hinglish and emojis, which matters when a paid reel reaches a wide audience.

Frequently asked questions

**Does Viralyze need access to my Ads Manager?** No. It connects to your Instagram account through Meta's official login and only works with comments on your posts; it never touches your ads account.

**Is there a limit on how many DMs an ad can trigger?** Instagram allows one private reply per comment within 7 days, and the app follows that rule; the Starter plan includes unlimited Auto-DMs.

**What if the boost brings spam comments?** Only comments containing your keyword trigger a DM, so random spam is ignored.

Start your 7-day free trial of Viralyze, no card needed, before your next boost goes live.