Facebook Custom Audiences: The 2026 Setup Guide

Custom audiences are how you turn cold traffic into warm — and warm into customers. They're the highest-ROAS audiences in any Meta account.

But most accounts only run 1–2 custom audiences ("all website visitors") and miss 80% of the available retargeting volume.

Here's the 12-audience setup I build for every Shopify store I manage.

TL;DR

The 12 audiences:

Website-based (6):

1. All website visitors — 30 days

2. Product viewers — 30 days

3. Add to cart, no purchase — 14 days

4. Initiated checkout, no purchase — 14 days

5. Purchasers — 90 days

6. Purchasers — 180 days

Customer file-based (3):

7. Email subscribers

8. SMS subscribers

9. Past purchasers (uploaded list)

Engagement-based (3):

10. Instagram engagers — 30 days

11. Facebook page engagers — 30 days

12. Video viewers (75%+) — 30 days

Why custom audiences matter

Cold prospecting has a CAC. Custom audience retargeting has a fraction of that CAC.

Typical numbers:

Cold ASC: ROAS 1.8–2.5.

Custom audience retargeting: ROAS 4.0–8.0.

You earn more per peso spent on warm than cold. Don't leave that on the table.

Audience 1: All website visitors (30 days)

Your broadest retargeting pool.

How to build:

Audiences → Create → Custom Audience → Website.

All website visitors, 30 days.

Use for:

Brand awareness retargeting (people who've heard of you but haven't engaged deeply).

New product launches.

Audience 2: Product viewers (30 days)

People who landed on a product page.

How to build:

Custom Audience → Website → People who visited specific URLs containing `/products/`.

Use for:

Mid-funnel retargeting.

"Reminder" creative.

Audience 3: Add to cart, no purchase (14 days)

High intent, didn't pull the trigger.

How to build:

Custom Audience → Website → Event: AddToCart in the last 14 days, EXCLUDE Purchase in last 14 days.

Use for:

Cart abandonment retargeting.

Discount offers.

Strongest ROAS retargeting audience for most accounts.

Audience 4: Initiated checkout, no purchase (14 days)

Ultra-high intent. Reached the payment step but didn't complete.

How to build:

Same logic as #3 but with InitiateCheckout event.

Use for:

Smaller spend, higher creative emphasis.

Trust signals (return policy, secure payment).

Audience 5: Purchasers (90 days)

For repeat-purchase campaigns.

How to build:

Custom Audience → Website → Event: Purchase in last 90 days.

Use for:

Cross-sell campaigns.

New product launches to existing customers.

Subscription upsells.

Audience 6: Purchasers (180 days)

For winback / longer cycle.

Use for:

Reactivation campaigns.

Major sales (BFCM, anniversary).

Lookalike source (longer history = better seed).

Audience 7: Email subscribers (uploaded customer file)

Upload your Klaviyo list.

How to build:

Audiences → Create → Custom Audience → Customer list.

Upload CSV with email + phone (more match points = higher match rate).

Use for:

Reactivating dormant subscribers.

Lookalike source.

Cross-channel reinforcement.

Refresh upload monthly.

Audience 8: SMS subscribers (uploaded)

If you're running SMS, upload that list separately.

Often higher LTV, more responsive than email-only.

Audience 9: Past purchasers list (uploaded)

Direct from your Shopify export.

Use for:

Lookalike source (highest-quality seed).

Win-back campaigns.

Audience 10: Instagram engagers (30 days)

People who interacted with your IG content.

How to build:

Custom Audience → Instagram account → People who engaged with any post or story in last 30 days.

Use for:

Mid-funnel retargeting on warmer signal.

Especially valuable for brands with strong organic IG presence.

Audience 11: Facebook page engagers (30 days)

Same as IG but for FB page.

Less powerful than IG for younger audiences in PH; valuable for older audiences (35+).

Audience 12: Video viewers (75%+)

People who watched 75%+ of your video ads.

How to build:

Custom Audience → Video → People who watched ThruPlay or 75%+ of any video.

Use for:

Lookalike source (in case you don't have enough purchase data).

Mid-funnel retargeting (already engaged with content).

Building these audiences in batches

Create all 12 in one session. They take 30–60 minutes total.

Most start populating immediately; some need 24 hours.

How to use them in campaigns

Retargeting campaign structure

One campaign with 3 ad sets:

Ad Set A: Add to cart, no purchase (14 days). Hottest.

Ad Set B: Product viewers + Initiated checkout, no purchase. Hot.

Ad Set C: All website visitors (30 days). Warm.

Each gets different creative angles:

A: cart-recovery offer, urgency, social proof.

B: product highlight, reviews, trust signals.

C: brand intro, hero product, lifestyle.

Exclusions

Always exclude existing purchasers from cold prospecting campaigns:

ASC: existing customer cap can handle this.

Manual prospecting: explicitly exclude Purchase 90 days.

Audience overlap

Some audiences naturally overlap:

Initiated checkout overlaps Add to Cart.

Product viewers overlaps All website.

Use Meta's Audience Overlap tool monthly. If overlap is high (>40%), your retargeting campaigns may be competing.

Solution: structure ad sets in waterfalls (most narrow first, then broader).

Refresh schedule

Website-based: refreshes automatically based on Pixel.

Customer file-based: re-upload monthly.

Engagement-based: refreshes automatically.

Set a calendar reminder to re-upload customer files on the 1st of each month.

Combining custom audiences with lookalikes

Use custom audiences as lookalike sources:

1% LAL of 90-day Purchasers — strong cold prospecting audience.

1% LAL of high-value Purchasers (top 25% AOV) — even stronger.

1% LAL of 14-day add-to-cart — alternate seed when purchase data is limited.

Common mistakes

1. Only "all website visitors" audience

Misses the higher-intent audiences entirely.

2. No exclusions on prospecting

Wasting prospecting spend on existing customers.

3. Stale customer file uploads

Re-upload monthly, not "when I remember."

4. Window too long

A 365-day add-to-cart audience is too stale. Stick to 14–30 days for high-intent audiences.

5. Overlapping campaigns

Running 4 campaigns all targeting overlapping audiences. They compete with each other in the auction.

Privacy considerations

Match rates have dropped over the years. Expect 50–70% match for customer file uploads.

Pixel events lose ~10–30% to iOS 14+ tracking limitations. CAPI offsets this.

Always have CAPI configured. Custom audiences depend on event signal.

Want help building custom audiences?

A clean audience structure is the foundation of profitable retargeting. My Facebook Ads Specialist service includes audience builds. Or learn the system in the Facebook Ads Course Philippines.

Related reading:

Facebook Lookalike Audiences in 2026

Facebook Pixel Events Guide

Retargeting & Remarketing Strategies for E-commerce