Website Custom Audiences (WCA)

What is a WCA?

WCA stands for Website Custom Audience — a Meta advertising audience built from your website visitors, tracked via the Meta Pixel or Conversions API (CAPI). It allows you to re-engage people who visited your site, viewed specific products, added items to cart, or triggered other custom events.

Think of WCA as your warmest pool of leads — these users have already raised their hands by landing on your site. Whether they bounced or added to cart and ghosted, WCA lets you follow up with laser-focused ads based on what they did (or didn’t) do.

When Should I Use a WCA?

Use WCAs when you're running retargeting or re-engagement campaigns, particularly for:

• Cart Abandonment Recovery: Users who added to cart but didn’t convert.
• Product View Retargeting: Shoppers who browsed but didn’t purchase.
• Landing Page Visitors: People who visited a specific page but didn’t take action.
• Time-Based Re-Engagement: People who haven’t been back in 30–60 days.

WCA sits in the mid-to-bottom funnel — it's the ad equivalent of sending a personalized follow-up email. You’re not prospecting here — you're closing.

Why Does WCA Matter?

WCA is one of the highest-leverage tools in the Meta ads toolbox. These users are already familiar with your brand, which means:

• Lower CPMs
• Higher CTRs
• Faster time to purchase
• Lower CAC

Strategically, WCA helps you recover missed conversions, improve blended ROAS, and keep your brand sticky. It also helps you sequence messaging — you can speak differently to a product viewer than to someone who bounced off the homepage.

When performance tanks on cold, WCA campaigns can keep the entire ecosystem afloat.

What Are Common Mistakes With WCAs?

Overlapping Retargeting Windows

Retargeting everyone from 1–30 days without exclusions leads to ad fatigue and budget cannibalization. Always segment by intent and recency (e.g. 1–3 days, 4–7 days, 8–30 days).

No Frequency Caps

Bombarding WCAs with the same ad five times a day burns trust fast. Frequency capping avoids over-saturation.

Lazy Creative Matching

Serving generic brand ads to cart abandoners is a missed opportunity. Customize creatives by behavior — urgency for carts, education for product views, credibility for bounce traffic.

How Do You Create or Apply a WCA?

Here’s how to set it up inside Meta Ads Manager:

1. Go to Audiences in Business Manager.
2. Create a Custom Audience → Website.
3. Choose the pixel or CAPI source.
4. Define your parameters:
5. Name it clearly (e.g., “ATC Last 7 Days - Exclude Purchases”).
6. Use this audience in retargeting ad sets, ideally layered with exclusions (e.g., exclude past 7-day purchasers).

Pro Tip: Use dynamic product ads (DPA) with WCAs to match ads with the products users already interacted with.

What Frameworks or Metrics Is It Connected To?

• AIDA Framework: WCAs target users in the Desire and Action phases. You’re bridging the gap between intent and conversion.
• Customer Journey Mapping: WCAs are central to post-visit sequencing.
• Blended ROAS & MER: Retargeting WCAs helps bring down overall CAC and lift ROAS.
• Retention Loops: Lapsed WCAs (e.g., 60+ day visitors) can be reactivated in promo cycles.

How Is WCA Different From Lookalike Audiences?

In short: WCA = real people who visited, LAL = modeled people who look similar.

What Are Real-World Examples of WCAs in Action?

DTC Skincare Brand

Set up WCAs for Add to Cart (ATC) in the last 7 days and paired it with DPAs showing exactly what users left behind. Added a 15% discount CTA. Result: 5.6x ROAS on WCA campaigns vs 2.3x on cold.

Apparel Brand

Ran three WCA segments: Viewed Product (1–3d), ATC (4–10d), and Site Visit Only (11–30d). Each had tailored messaging — urgency, education, and re-introduction respectively. Helped recover over 18% of abandoned carts in Q4.

What’s the 2x Take on WCA?

At 2x, we treat WCAs like gold-plated leverage zones — not “set it and forget it,” but a dynamic, evolving pool of buyer intent. Here’s our perspective:

• Segment by behavior and recency — the closer to purchase, the harder you hit.
• Never run WCA without exclusions — clean overlaps = clean data.
• We pair WCA with DPA, tailored creative, and urgency-based offers.
• WCAs are also prime seeds for Lookalikes, fueling smarter prospecting loops.

In short: Your WCA is your CRO playground. If it’s not converting, the problem isn’t targeting — it’s your offer, creative, or experience.

FAQs About WCA

How big should my WCA be to be effective?

At least 1,000 users per segment is ideal for reliable delivery. But you can start with 300–500 for ATC or checkout segments.

Can I use WCA on Instagram and Facebook separately?

Yes, but Meta treats the audience source the same — you can control placement by ad set or campaign settings.

How do I exclude purchasers from WCA campaigns?

Create a separate Custom Audience for “Purchase” and exclude it at the ad set level.

Does WCA work with CAPI only (no pixel)?

Yes, as long as CAPI is passing event data like ViewContent, ATC, etc.

Can I use WCA for lead gen or non-eCommerce brands?

Absolutely. Create WCAs based on visited landing pages, form views, or custom thank-you pages.