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By the end of this lesson, you'll have one real audience built from a segment and synced live to both LinkedIn and Meta. What used to be a CSV export, a manual upload, and a field mapping session takes about two minutes here.

🧭 The Order of Operations

The ad sync builder is a three step wizard, and it helps to know where you are before you start clicking:

1. Setup - Who's going where, and on what schedule.
2. Match - The step that lifts your match rate.
3. Sync - The send to the ad platform.

Creating the audience and connecting the destination happened in the previous lesson. Syncing itself can take 48 hours or more depending on the platform and the size of the list, so plan on building in one sitting and reading results in another.

👥 Where the People Come From

There are two ways to get people into an ad sync.

Start From All People

This is the default, and the one to reach for first. All People is your unified view: your CRM records plus your Clay-sourced records, everything in one place.

It matters which is which, because the compliance rules differ by source. To check provenance at any time, filter by source: choose Source, then Origin source, then the system you're looking for. Filtering on origin source contains Salesforce shows you exactly who came out of your own CRM.

From there, segment down to your targeting cut. The example segment in this lesson filters to people with a title of VP of Product who are located in San Francisco.

Or Build a Clay Search

The second way in creates a brand new Clay-sourced list:

1. Go to Find leads and build a people search.
2. Run the search - The example query returns a segment of 8,457 people.
3. Click Save to people to save the results into Audiences.
4. Click Turn on auto save when you're ready to promote it - This moves everyone out of draft and into your audience as a new segment.

That segment is now available to sync, exactly like a segment cut from All People.

📝 Step One: Setup

With your segment open, click Send, then sync to the ad platform.

Name the Sync

The sync name is required, and it does more work than it looks like: the name you give the sync is what names your destination audiences on the platform side.

Give it a name you'll be able to find three months from now, one that describes who's in it and what it's for. The last thing you want is a list of unnamed syncs you can't map back to their campaigns, which is the same problem as a Clay workspace full of unnamed tables. We've all been there.

Pick Your Destinations

Add the ad providers you connected last lesson. This example sends to LinkedIn and Meta.

You can also add multiple destinations of the same type. That's the agency case: one audience going out to several client accounts, without rebuilding it per client.

The 300-Person Floor

300 people is the floor for any sync. Below that, the sync fails, and it can fail unevenly.

Unevenly is the part that catches people. One platform can accept an audience the other rejects, in the same run. That happened on the sync in this lesson: LinkedIn Ads took it without complaint, and Meta Ads rejected it for being under the 300 threshold. Build lists of more than 300 people and you never meet this.

The Suppression Count

There's a small red number in the Setup panel that's easy to miss. This is Clay's compliance backstop: records Clay will not send to the ad platform.

The two rules behind it:

• Geography: Clay-sourced data can only go into ad audiences in the US. Outside the US, build audiences from your first-party data, because consent lives in your own systems.
• Google: Google takes first-party data only, in every region. Clay filters Clay-sourced records out of Google syncs automatically.

Full detail lives in Clay's compliance doc.

You can verify the number against your own data, which is a good habit the first few times. A suppression count of -56 meant 56 non-US records that came from Clay searches were being held back. Filtering that audience on non-US returned exactly 56 people. The same check on a different sync showed -32 for an audience of engineering directors in the US and France; filtering that audience on people living in France returned 32. When the count matches what you expect from your own filters, your sync is doing what you think it's doing. A clean audience shows zero here.

Set the Schedule

This is the most missable setting in the product, and it's worth slowing down for.

Your audience updating and your sync firing are two different things. The audience keeps itself current automatically as data changes and people flow in and out of it. But the sync to the ad platform is its own setting, and it has two options:

• Recurring - The sync re-fires on a schedule, so the platform keeps getting the current list.
• One-time - A snapshot, frozen at the moment it ran.

If you want a dynamic audience to stay dynamic on the ad platform, select recurring. A living audience wired to a one-time sync is just a snapshot with extra steps.

🎯 Step Two: Match

Match has three options: Best match rates, Good match rates, and None. This is enhanced matching, and it's the thing that lifts your match rate. Pick a tier and keep moving; the next lesson is entirely about what this is doing.

Below the tier picker are two mapping sections:

Email fields: If you already hold personal emails on your records, point this at that column. It's additive, so your emails stack on top of what enhanced matching finds, and more identifiers means a better chance of matching.

Additional fields: Map a field once and Clay routes it to whichever platforms accept it. It's free and it can theoretically improve match rate, so there's no reason not to. Just know it isn't the lever. What we've observed is that the best leverage on match rate is a work email or a LinkedIn profile, which is the subject of a later lesson.

📤 Step Three: Sync

Before you commit, Clay shows what it's about to enrich and the estimated credit cost. Nothing runs until you approve it.

Click Enrich and sync. The enrichment runs first, then the platform syncs fire on their own as each one finishes, and you'll see the run marked in progress while it works.

From that point it maintains itself: new people entering the audience get matched automatically and go out on the next recurring sync.

Two things to expect during the wait:

• Match rate takes about 48 hours to come back, sometimes more. You will not sync and read your results in the same sitting.
• LinkedIn reports preliminary numbers first, so the figures move while it settles. Let the data bake before you read anything into it.

🔗 Where It Lands

Once a sync finishes, the audience is waiting on the platform side. In LinkedIn Campaign Manager, go to Plan, then Audiences, and search for your sync name. That's the name you set back in Setup doing its job.

From there it's ready to be attached to a campaign or used as an exclusion list, whichever you're building.

🕰️ One Note on Legacy Ads

If you used Clay Ads before, you may notice a different four step flow on your past syncs. That's the legacy ad platform surface, and it's where your old syncs live. There's nothing there to learn for what we're building.

🚀 What's Next

You can now source people two ways, name a sync so it's findable on the platform side, clear the 300-person floor, read the suppression count against your own data, and choose a schedule that actually keeps the platform current. Segment to live on two platforms, in about two minutes, and the list stays current on its own.

Next up is enhanced matching: what it actually does, and why it's the part that moves your match rate.