How to promote a webinar and fill it: from registration to live attendance

Shorter than you'd think, but longer than most teams do it. Zoom looked at more than 9 million webinar sessions and compared the 1,000 best-attended ones with the rest.

Even among the winners, 32% got there with 1 to 7 days of promotion. And whatever you plan, registrations bunch up at the end.

So the practical answer: start about 3 weeks out, which is when Univid recommends sending the first invite, expect a slow first week, and save your strongest push, the personal invitations and follow-ups, for the last 7 days. Don't read the bunching as 'promotion only matters at the end'. The early weeks build the awareness the final week converts. And keep registration open until you go live.

Call it what it is, and make the format sound worth showing up for. Zoom compared average attendance by the format name on the invite.

Here's the twist: Goldcast's 2025 data on more than 19,000 B2B webinars found the opposite for the word itself. Titles with 'webinar' in them averaged 36% attendance, above Goldcast's 33% overall average. Both can be true. Zoom compares format labels against each other, Goldcast compares plain titles against clever ones. The lesson that survives both: be clear. Say the format and the outcome.

Zoom's survey also found 82% of attendees cite knowing the format as a reason to register, far ahead of the topic or title at 40%. So write 'Fireside chat: how 3 CFOs got month-end close down to 5 days', not 'Q4 Finance Webinar Series'.

Most timelines cover only email and social posts. Add a third lane: personal invitations to the specific people you want live.

For a full event marketing calendar beyond webinars, see the 8-week event marketing plan.

Email is the workhorse because it reaches people who already know you.

Zoom's attendee survey shows the next lever. 26% found their last webinar through an email invitation, 20% through a colleague or peer, and only 9% through social media. That 20% is the interesting one. A recommendation from a person is a personal invitation. You can't fake a colleague, but you can send what a colleague sends: a short, specific note from a real person about why this session fits them.

Pick the channels your ideal attendees open every day:

• LinkedIn: connection requests, DMs, InMails and the event invite button. LinkedIn caps event invitations at 1,000 a week, shared across all your events, and only reaches 1st-degree connections.
• Instagram and Facebook: owner-run businesses, coaches, agencies and local audiences.
• X and Threads: founders, operators and builders who post in public.
• TikTok: creators and consumer-facing brands.
• Reddit and Discord: communities where your topic is already being discussed. Their rules on self-promotion are strict, so read them first.
• Cold email, last: for the people you can't reach anywhere else, plain text, short, no attachments.

Speakers and partners are a channel too. Give each one a pre-written post and a personal note they can send to 10 people they know.

One person, one reason, one easy question. No link in the first message on social channels. Ask if they want it.

A yes to 'want the details?' starts a conversation instead of a click you can't see. Then the real work begins, because replies come with questions.

More templates for each channel: LinkedIn event invitation messages and event invitation emails.

The gap between registered and live is where most webinars lose. 54.2% of webinar practitioners in Livestorm's study name it their top challenge. What moves it:

• A calendar invite the moment they register, with the join link inside it.
• Reminders the day before, 1 hour before and 5 minutes before (Univid), with the 24 to 48 hour one focused on what they'll experience live (Zoom).
• A live-only reason to come: Q&A, polls, a resource only for live attendees. 31% of Zoom's surveyed attendees said live-only content makes them more likely to attend.
• A personal check-in for your most important registrants the day before.
• A 'we're live' message to everyone who hasn't joined 5 minutes in.
• Start on time. Zoom found 77% of attendees arrive before the start or within the first 5 minutes.

The full reminder sequence across email, SMS and DMs is in how to reduce event no-shows.

Every dataset names a different winner, which tells you the day matters less than your audience's calendar.

Midweek, early afternoon in your audience's time zone, is a safe default. Zoom notes Wednesday is crowded in many markets, so test an off-peak slot if your audience lives in meetings midweek. Livestorm also finds January the strongest month (50.4%) and August the weakest (42.9%).

Gating gets you the registration. Ungating gets you viewers. Livestorm found public replays get 3.7x as many views as gated ones, yet 62% of teams restrict replays to registered users.

A middle path that works for most B2B teams: send the replay to every registrant within 24 hours, keep it gated for a week while you follow up, then publish clips or the full session openly. Goldcast's 2026 data says 91% of on-demand viewers watch nearly the whole recording, so the people who do press play are worth a follow-up.

Promise the recording, but don't let it replace the live session. Keep 1 thing live-only, like the Q&A, and say so in every reminder.