LinkedIn Event Ads: The Timeline That Drives Registrations

Most of the event campaigns I inherit have the same shape. Somebody built the LinkedIn Event page ten days before the roundtable, put budget behind it for a week, and watched registrations land somewhere in the low twenties. Then roughly half of those people didn't turn up. The post-mortem blames the topic, or the time slot, or LinkedIn.

The topic was usually fine. The timeline wasn't. An event isn't a campaign you launch, it's a campaign with a deadline attached, and that deadline changes what the right ad is every single week. What works six weeks out is the wrong ad in the final seventy-two hours. And the ad that fills the room isn't the ad that gets people to actually show up in it.

I'm Léo Le Henaff, Co-founder and CTO of Moriah, a LinkedIn marketing agency and a LinkedIn Certified Marketing Partner. I own the systems behind our clients' LinkedIn workflows, so event campaigns land on my side of the house: the audience layer, the sequencing, the reporting that tells us whether any of it worked. LinkedIn Ads are one of three pillars we run for established B2B companies, alongside executive personal branding and targeted outreach.

What follows is the whole timeline for one event, week by week. Registration and attendance are the two numbers we grade it on, and I'll be specific about where each one gets won.

What LinkedIn Event Ads Actually Are

Event ads are a Sponsored Content format, so they run in the feed alongside everything else. The difference between them and a single image ad pointed at a registration page: LinkedIn treats the event as a structured object, not a link. Event name, date and time populate the ad automatically, and the ad carries a register button instead of a generic click-through.

They run against four campaign objectives: brand awareness, website visits, engagement, and lead generation. For the wider picture of where this format sits among the others, our overview of the types of LinkedIn ads lays out every format grouped by objective.

Two changes landed in April 2026 that matter for how you plan a campaign.

Off-platform event ads. You used to need a LinkedIn Event page created from your Company Page before you could advertise anything. That requirement is gone. An event ad can now point at an external registration URL: your own site, an event platform, a webinar tool. You supply the event metadata yourself, so type, timezone, dates, times, and the physical address if it's in person. The creative is a 16:9 image at 480x270 or 1280x720 pixels, JPEG, PNG or GIF, up to 5 MB.

Lead Gen Forms on event ads. Registration can now happen inside the ad unit. The member fills a pre-filled form in the feed and never leaves LinkedIn, and the lead data downloads directly or syncs to your CRM. If your registration flow is the bottleneck, and it often is, this takes the landing page out of the equation entirely. Our guide to LinkedIn Lead Gen Forms covers the field-by-field decisions that decide completion rates.

Choosing between the two setups involves one real trade-off. A LinkedIn-hosted event gets a behaviour off-platform events don't, provided you broadcast the session with LinkedIn Live: the ad changes on its own as the event moves through its stages. Static image before, live video during, replay after. You build one campaign and LinkedIn re-renders it three times. Host the event page on LinkedIn but stream it somewhere else and you get the before and after stages without the live one. That's why I still default to hosting on LinkedIn for webinars and virtual roundtables, and keep off-platform ads for in-person events and anything where registration has to happen in a system we don't control.

Six Weeks Out: Build the Audience Layer Before You Build the Ad

This week produces no registrations. It still decides the campaign.

LinkedIn audiences aren't instant. A Matched Audience takes up to 48 hours to build, sometimes longer, and every audience needs at least 300 member accounts before a campaign will serve to it. Start assembling audiences in week two and you'll hit the 300 floor at exactly the moment you have no time left to widen anything.

So the first pass is inventory. What do you already have that can be turned into an audience before the event exists?

• Your CRM. Closed-lost opportunities, pipeline that went quiet, customers who would bring a peer. Each of those is a different commercial situation and deserves its own contact list, not one merged upload. LinkedIn needs at least 300 rows to accept an upload and at least 300 matched member accounts before the audience will serve, and match rates on work addresses are unpredictable, so upload lists in the thousands, not the hundreds.
• Past event attendees. Anyone who registered for or attended a previous LinkedIn event is available as an engagement audience. Highest-converting audience you will run for the new one, and almost nobody builds it.
• Website visitors. Split by page group, not by domain. Someone who read three case studies is in a different place than someone who read one blog post.
• A named account list. If the event exists to open conversations at specific companies, upload the company list now. LinkedIn needs a minimum of 300 companies and recommends 1,000 or more for a healthy match.

Lookback windows run from 30 to 365 days. For an event, longer is usually right on the CRM and website audiences, because you want reach. Shorter is right on anything you intend to treat as high intent later in the timeline.

The other job this week is the event asset itself. Date, format, speakers, and a description that survives being read in a feed. If you're hosting on LinkedIn, the ad image comes from the Event page instead of being uploaded separately in Campaign Manager, so the Event page image is the ad creative. Get it right once.

Weeks Five to Three: Registration From a Cold Audience

Now you spend. This phase runs against the lead generation objective if you're capturing registrations in-ad, or website visits if registration lives on your own site.

The mistake here is treating the whole audience as one campaign. Split it in two, because the two halves need different creative and produce different costs.

The known audience gets the direct ask. Your CRM lists, past attendees, engaged website visitors. These people know the company, so the ad doesn't have to explain who you are. Name the topic, name the date, ask for the registration. Cost per registration here should be a fraction of what you pay anywhere else, and if it isn't, the problem is list quality, not creative.

The cold audience is where the topic has to carry the ad. Job titles, industries, seniorities, company lists: people with no relationship to you. Here the introductory text does the work, and you have up to 600 characters of it. Use them to state the specific problem the session addresses and who is speaking, not to describe the format. Nobody registers for "a webinar." They register to hear a named person answer a question they currently have.

A note on what LinkedIn claims for this format. LinkedIn reports that promoted events draw substantially more viewers and registrations than unpromoted ones, and cites up to 40% lower cost per registration for event ads compared with other approaches. Those are the platform's own figures. Treat them as directional and grade your campaign on your own numbers.

Run this phase long enough to learn something. Three weeks of delivery tells you which segment converts and which creative angle lands, and both answers are what you spend the final phase acting on.

Weeks Two to One: Retarget the People Who Looked and Left

By now you have something you didn't have at the start: a population of people who saw the event and didn't register.

This is the highest-leverage audience in the timeline, and it only exists because you spent the three weeks before it. Build engagement audiences from people who engaged with the event ads, people who opened the Lead Gen Form and never submitted it, and people who visited the registration page without completing. Then exclude everyone who already registered. Nothing is more wasteful than paying to invite a person who is already coming.

The creative changes here. In the first phase you were introducing a topic. Now you're answering an objection, and the objections are predictable:

1. "I'm not sure it's worth the hour." Answer with the specific takeaway. One concrete thing they'll leave with.
2. "I can't make that time." Say plainly that registrants get the recording. This recovers more registrations than anything else in the sequence, and it's also how you keep collecting registrations from people who were never going to attend live.
3. "I don't know who else will be there." Name the audience. Peers in their function, in their sector.

If our client has an executive publishing on LinkedIn, this is also the week their personal posts start pointing at the event. A registration ask from a named person's profile carries differently than the same ask from a company page, and the gap is not small: content published from a personal profile performs roughly 5 to 10 times better than the same content from a company page. Running the paid layer and the personal branding layer in the same week, against the same audience, is why we run them together instead of as separate programs.

Our guide to LinkedIn retargeting goes deeper on audience architecture and the exclusion rules that stop these phases overlapping.

The Final Seventy-Two Hours: Registration Stops, Attendance Starts

Here's the switch most campaigns never make. Up to this point every ad has been asking for a registration. In the last three days the number that matters changes, because a registration is not an attendee.

Show rates for B2B webinars are worse than most teams admit, and the difference between a well-attended session and an empty one is almost entirely made in these seventy-two hours. So the final phase runs two campaigns in parallel.

Against non-registrants, urgency, and only real urgency. A closing date, limited seats if the seats are genuinely limited, the fact that it starts tomorrow. Don't manufacture scarcity for a webinar that has none. Established buyers spot it instantly and it costs you more credibility than the registration is worth.

Against registrants, a reminder. This is the campaign nobody builds and the one I'd keep if I could only keep one. Build an audience from people who submitted the registration form, target them specifically, and put a single reminder ad in front of them the day before and the morning of. Your email reminders are already going out and a large share of them are never opened. The LinkedIn feed catches the people the inbox missed.

The reminder ad costs very little, because the audience is small and the frequency is deliberately high for two days. Cheapest attendance you will ever buy.

During the Event: The Campaign You Already Built

If you're broadcasting the session with LinkedIn Live, this phase largely runs itself. The event ad renders as live video while the session is happening, so the ad your budget was already buying becomes a live entry point. People who never registered can join from the feed.

Keep budget live through the session instead of switching it off at the start time. The instinct is that spend after the doors open is wasted, and for an in-person event it is. For a virtual session it isn't: a portion of your attendance comes from people who see it running and join twenty minutes in.

One operational note. Introductory text stays the same across all three event stages unless you build separate ad sets for each. If you want the copy to change from "register" to "we're live now" to "watch the replay," plan those as distinct ad sets before the event, not edit one on the fly.

After the Event: Two Audiences, Two Different Messages

Follow-up is where events either produce pipeline or produce a nice afternoon. The mistake is treating everyone who registered as one group, when attendees and no-shows sit in completely different commercial positions.

No-shows are still interested. They registered, which is a real signal, and something got in the way. Build the audience from registrants, exclude attendees, and run one thing at them: the replay. No pitch. The ad's only job is to convert a registration into a view, and a meaningful share of them will watch it.

Attendees gave you an hour. This is the warmest audience your company will hold all quarter and it decays fast, so the follow-up runs in the days after the session, not the month after it. Here the ad can ask for the next step directly, whether that's a conversation, an assessment, or the specific offer the session was built to lead into.

Both groups are also where the paid layer hands off to the rest of the engine. An attendee list is a targeted outreach list. When someone from the client's team messages a person who attended the roundtable last Thursday, referencing what was actually discussed, the reply rate is nothing like cold outreach. LinkedIn outreach generally sees around 10 to 15% replies against 1 to 3% for cold email, and messaging an attendee sits well above the top of that range, because the person already knows who you are and why you're writing.

That handoff turns an event from a marketing activity into pipeline, and it doesn't happen automatically. It happens because someone planned for the attendee list to become a targeted outreach list before the event ran.

The Two Numbers That Grade the Campaign

Impressions and clicks tell you the ads are delivering. They don't tell you whether the event worked. Two numbers do.

Cost per registration is the paid media number. Track it separately by phase, because a blended figure hides everything useful. Your retargeting phase should be dramatically cheaper than your cold phase, and if it isn't, either your audiences aren't excluding properly or the cold phase never built a real pool of engaged non-registrants.

Show rate, attendees divided by registrations, exposes whether the final seventy-two hours were run properly. It also tells you whether your registrations were real. A campaign that produces 200 registrations at a 20% show rate has produced 40 attendees and a lot of cost. A campaign that produces 90 registrations at a 55% show rate has produced 50 attendees and a much better list. The first one looks better in a report. The second one is better.

Below those two, watch registration quality by segment. LinkedIn reports demographics on who registered, and if the titles coming through don't match who the session was built for, that's a targeting correction to make during the campaign, not a lesson to learn after it.

Why a Well-Run Event Campaign Still Underdelivers

I've seen this timeline executed properly and still produce a thin result, and the reason is almost always the same. The event ran into a cold market.

Nobody in the audience had seen the company's name in their feed before the invitation arrived. The executive hosting the session had a profile with four posts on it from 2024. The follow-up landed as a cold message from a name the attendee had no reason to recognize. The paid layer was fine. Everything it was supposed to land on was missing.

That pattern sits behind Moriah's whole approach. A company that publishes content but activates nothing around it gets no business. A company that runs targeted outreach with no content behind it gets no business either. Personal branding, targeted outreach, and LinkedIn Ads only produce outcomes when they run together against one business objective, which for an event campaign is a room full of the right people and the conversations that follow it.

LinkedIn Ads is one of the three pillars we run, and we don't sell it on its own, because it doesn't work well on its own. We run all three in-house against whatever the client is actually trying to achieve, on a monthly retainer with no commitment, no minimum term, and no lock-in. In the United States that's $4,000 a month.

If your next event matters, the work starts six weeks out, and not all of it is advertising.

Frequently Asked Questions

What are LinkedIn event ads? LinkedIn event ads are a Sponsored Content format that promotes an event in the LinkedIn feed, with the event name, date and time populated automatically and a register button on the ad. They run against brand awareness, website visits, engagement, and lead generation objectives.

Do I need a LinkedIn Event page to run event ads? Not since April 2026. Off-platform event ads let you point at an external registration URL on your own site, an event platform, or a webinar tool, with the event metadata supplied by you. Hosting on LinkedIn still has one advantage: broadcast with LinkedIn Live and the ad changes automatically across the before, during and after stages.

How far in advance should I start promoting a LinkedIn event? We build the audience layer six weeks out and start spending around five weeks out. The audience work has to come first, since Matched Audiences take up to 48 hours to build and need at least 300 member accounts to serve. Discovering that in week two leaves you no room to fix it.

What are the image specs for LinkedIn event ads? For off-platform event ads, a 16:9 image at 480x270 or 1280x720 pixels, in JPEG, PNG or GIF, up to 5 MB. For a LinkedIn-hosted event, the image comes from the Event page itself instead of being uploaded in Campaign Manager, so the Event page image is your creative. Introductory text runs up to 600 characters.

Can I collect event registrations without sending people to a landing page? Yes. LinkedIn integrated Lead Gen Forms into event ads in April 2026, so members submit the registration form inside the ad unit with their profile data pre-filled. The lead data downloads directly or syncs to a CRM or marketing automation system.

How do I promote a LinkedIn event to people who didn't register? Build an engagement audience from people who interacted with the event ads or opened the Lead Gen Form without submitting, exclude everyone who has already registered, and run creative that answers the specific objection instead of repeating the invitation. Mentioning that registrants receive the recording recovers more registrations than any other single message.

What is a good cost per registration on LinkedIn event ads? It varies too much by market and seniority for a single benchmark to be useful, so measure it per phase rather than blended. Your retargeting phase should come in far below your cold phase. If the two are close, either your exclusions aren't working or your cold phase never built a real pool of engaged non-registrants.

How do I improve webinar attendance from a LinkedIn campaign? Run a reminder campaign in the final 72 hours against an audience built from people who submitted the registration form, at deliberately high frequency for two days. Email reminders miss a large share of registrants, and a small, cheap ad in the feed catches the people the inbox didn't.

Should I keep ads running during the event itself? For a virtual event broadcast with LinkedIn Live, yes. The ad renders as live video while the session runs, so people can join from the feed after it has started, and a portion of your attendance comes from exactly that. For an in-person event, stop the spend at the door.

What should I do with the attendee list after the event? Split it in two. No-shows get one ad promoting the replay and nothing else, since their registration was a real signal and something simply got in the way. Attendees get a direct ask for the next step, and they should also become a targeted outreach list within days, while the session is still recent enough to reference.