> ## Documentation Index > Fetch the complete documentation index at: /help/llms.txt > Use this file to discover all available pages before exploring further. # Comment automation > Comment a keyword, get a DM: people who comment a keyword on your own LinkedIn posts enter a campaign, and Kerux can answer their comment. **Comment automation** works on your **own** LinkedIn posts. You pick a post and one or more keywords (for example `PLAYBOOK`). When someone comments one of them, they become a contact and enter the campaign you chose, once. The campaign's own steps then send the DM, or the invitation first if you aren't connected yet, with all of the account's usual limits. Kerux can also answer their comment for you, at a human pace. Every comment on the post is listed so you can answer it too, with **Reply with AI** if you want. Find it in **Campaigns > Social posts > Comments on your posts**, or click **Comment automation: comment a keyword, get a DM** under a published post. Owners, admins and members can set it up and answer comments; viewers can see them. > [!NOTE] > > Answering comments isn't available yet. Until it is, Kerux reads the comments, and keyword commenters become contacts and enter the campaign (its own steps send the DM), but nothing answers their comment: **Turn on** stays grayed out while **Answer their comment automatically** is ticked, and **Answer** is grayed out under each comment. The page says **Answering comments from real LinkedIn accounts is being switched on.** ![Comments on your posts: a comment automation with its keywords, campaign and answer, and the comments filters](https://mintcdn.com/kerux-f37add41/hxXnH5J2aAMkPLq4/images/comment-automation.png?fit=max\&auto=format\&n=hxXnH5J2aAMkPLq4\&q=85\&s=ba60dd875250cd948b3e41e6be81e8f3) ## Set it up **1. Pick the post** Under **Your post**, choose a LinkedIn post you published from [Social posts](/help/campaigns/social-planner.md). For a post you published on LinkedIn yourself, choose **Another of my posts (paste its link)**, pick the account and paste the post's link: Kerux checks it is one of that account's own recent posts. Other people's posts can't be used. **2. Add keywords** Type the words, separated by commas (up to 10). Case and accents don't matter, and only whole words count: `guide` matches "Guide please!" and "GUÍDE", not "guidebook". Without keywords, the comments are only listed. **3. Choose the campaign** Under **Campaign they enter**, pick the campaign that sends the DM. Each person enters once, even if they comment the keyword twice. A campaign that isn't launched yet keeps them waiting in its **Contacts** tab until you launch it. **4. Answer their comment (optional)** Once answering is available (see the note above), tick **Answer their comment automatically** and write the answer, for example `Thanks {{first_name}}! Check your DMs.` Variables are filled in for each person; an answer with an empty variable is never sent (it waits for you under **Needs a decision**). **5. Turn it on** Click **Turn on**. Kerux reads the post's comments in the next minutes. ## How the post is read Kerux reads the post with a [signal](/help/leads/signals.md) on the same account (the post's own watch, or a new one that counts toward the account's 5 active watches), so it shares the signals' limits: at most 8 reads a day per account, only in the daytime, every 2 hours while the post is fresh (its first 48 hours) and then once a day, for 7 days (or until you stop it). **Read again soon** moves the next read forward, within those limits. The people who react or comment also become contacts in the signal's list, as with any signal. ## The comments list Each comment shows who wrote it (with their LinkedIn profile), what they said, the keyword it had, what happened (**Entered the campaign**, **Waiting for the campaign's launch**, **Already entered this campaign**) and Kerux's answer. Use the filters **All**, **With a keyword**, **To answer** and **Needs a decision**. Comments you haven't seen yet are marked **New**, and the button on Social posts shows how many there are. To answer a comment yourself, click **Answer**, write it (or click **Quick answer**, or **Reply with AI** to get a draft from the comment), then **Send answer**. It goes out within a minute or two. **Stop answer** stops an answer that hasn't gone out yet. ## Safe by design * **One answer per person per post**, and **at most 20 answers a day per account** (in the account's timezone), automatic and by hand together. * **A human pace.** An automatic answer waits a few minutes after Kerux sees the comment, answers from the same account are minutes apart, and automatic answers only go out in the account's working hours. * **Never answered twice.** If LinkedIn's answer gets lost, the comment shows **Needs a decision** with **LinkedIn's answer was lost. Kerux is reading the answers under the comment to see if it went out** while Kerux reads the answers under it. Found: it is marked answered. Not found after three checks: Kerux asks you. Look under the comment on LinkedIn, then click **It's on LinkedIn**, **Send again** (only if it isn't there) or **Don't answer**. * People on the [do-not-contact list](/help/campaigns/sending-rules-and-consent.md) never get an answer, and campaigns skip them. * Turning an automation off (or removing it) stops the answers still waiting. Its comments stay in the list. ## Why an answer didn't go out | What it says | What to do | | - | - | | Waits for the account's working hours | Nothing to do: it goes out when the account's hours start. | | This account already answered 20 comments today | Nothing to do: it goes out on the account's next day. | | The LinkedIn account needs attention | Reconnect it in **Connect accounts**. Kerux tries again. | | LinkedIn's limit for comments is reached for now | Nothing to do: Kerux tries again later. | | A variable in the answer is empty for this person | Click **Answer** and write it by hand, or **Stop answer**. | | The comment is more than 3 days old | No automatic answer for old comments. Answer by hand if you want. | | LinkedIn didn't take it after 3 tries, or refused it | Nothing was sent. Answer by hand to try again. | | Answers from real LinkedIn accounts aren't switched on yet | Keywords and campaigns already work. Answers will work once they are available. | ## API and webhooks Everything here is also in the [API](/help/developers/api.md) under **Comment automation** (`/v1/comment-automations` and `/v1/post-comments`): set up, change, read again, remove, list comments, answer, stop an answer and decide about one being checked. The [webhooks](/help/developers/webhooks.md) `linkedin.post_comment_received`, `linkedin.comment_keyword_matched`, `linkedin.comment_reply_sent` and `linkedin.comment_reply_failed` fire when a comment arrives, when it had a keyword, and when Kerux's answer goes out or can't. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.