Most people who visit your website don't convert on the first visit. Research consistently shows that 97–98% of first-time website visitors leave without taking action.
Facebook retargeting lets you stay in front of those visitors after they leave. Instead of starting from scratch with cold audiences, you're re-engaging people who already know your brand — which is why retargeting campaigns typically have conversion rates 2–3× higher than prospecting campaigns.
This guide walks through the complete setup: installing the Meta Pixel, building your retargeting audiences, creating your campaign, and writing ads that actually convert warm traffic.
Facebook retargeting (also called remarketing) is a strategy that shows ads specifically to people who have previously interacted with your business — by visiting your website, watching your videos, engaging with your Facebook or Instagram page, or submitting their contact information.
When someone visits your website, a small piece of code called the Meta Pixel fires and records that visit. Facebook then matches that visitor to a Facebook or Instagram user and allows you to target them with ads.
The result: your ads reach people who are already familiar with your brand, rather than complete strangers.
The Meta Pixel is the foundation of all website-based retargeting. Without it, Facebook has no way of knowing who visited your site.
You have three options:
Option A: Manual installation (paste into your website)
Option B: Partner integration (easiest) Meta has direct integrations with most major platforms. If you're on Shopify, WordPress, Squarespace, or Wix:
Option C: Google Tag Manager If you're using GTM:
Install the Meta Pixel Helper Chrome extension. Visit your website — the extension icon should show your pixel ID with a green indicator, confirming it's firing correctly.
The base pixel tracks page views by default. To build more specific retargeting audiences (people who added to cart but didn't purchase, people who reached a specific page), you need to add standard events.
Key standard events to implement:
|
Event |
When to fire |
Use case |
|---|---|---|
|
ViewContent |
Product/service page |
Retarget page viewers |
|
Lead |
Thank-you page after form submit |
Exclude converted leads |
|
InitiateCheckout |
Checkout start page |
Cart abandonment retargeting |
|
Purchase |
Order confirmation page |
Exclude purchasers |
|
Contact |
Contact page visit |
Warm audience targeting |
How to add an event (manual method): Below your base pixel code, add the event code. For a thank-you page:
fbq('track', 'Lead');
For a product page:
fbq('track', 'ViewContent', {
content_name: 'Product Name',
content_category: 'Category',
value: 0.00,
currency: 'USD'
});
Place event codes on the specific pages they correspond to — not on every page.
Now that your pixel is collecting data, you can build Custom Audiences from your website visitors.
All website visitors (30 days)
All website visitors (90 days)
Specific page visitors
Visitors who didn't convert
Video viewers (25% / 50% / 75%)
Page engagers
Lead form openers
Campaign (Retargeting)
├── Ad Set 1: Hot — Website visitors (last 14 days)
├── Ad Set 2: Warm — Website visitors (15–30 days)
└── Ad Set 3: Engaged — Page engagers + video viewers
Splitting by recency lets you show more aggressive offers to recent visitors (who are closest to converting) and softer reminder ads to older visitors.
1. Budget: Start with $10–20/day per ad set. Retargeting audiences are small — overspending on a small audience leads to ad fatigue fast.
2. Audience: Select your Custom Audience from Step 3. If your audience is very small (under 1,000 people), consider expanding the time window or combining audiences.
3. Exclusions — critical: Always exclude people who have already converted:
4. Placement: For retargeting, start with Automatic placements. Facebook will allocate across Facebook Feed, Instagram Feed, Stories, Reels, and Audience Network based on performance.
Retargeting ads work differently from cold-audience ads. Your audience already knows who you are — your copy should reflect that.
Acknowledge they've already shown interest (subtly) Don't be creepy ("We saw you visited our website!") but do speak to someone who's already aware. "Still thinking it over?" is subtler than "Hi, we tracked you."
Remove friction from the next step What stopped them from converting? Common barriers: price uncertainty, time commitment, trust. Address these directly.
Use a different offer or angle to each recency tier
Test carousel ads with your most visited pages Carousel format lets you show multiple pages or products in one ad. For service businesses, use carousels to highlight different service categories or case studies.
The biggest mistake in retargeting is showing the same ad to the same person 20 times. Ad fatigue kills retargeting performance fast.
Recommended frequency caps:
How to set frequency caps in Meta Ads Manager: In your ad set settings, under Optimisation & delivery, set Frequency cap to your desired limit. Note: frequency caps are only available with Reach objective campaigns. For conversion campaigns, monitor frequency in reporting and pause/rotate ads when frequency exceeds 3–4.
Key metrics for retargeting campaigns:
Weekly optimisation checklist:
How many website visitors do I need before retargeting works? You need at least 100 people in a Custom Audience before Meta will serve ads. In practice, 500+ visitors gives the algorithm enough data to optimise. If your website traffic is low, start by building audiences over a longer time window (60–90 days) and combine with video viewers and page engagers.
Does retargeting work without the Meta Pixel? You can retarget using on-platform data (video viewers, page engagers, lead form openers) without the pixel — but website-based retargeting requires the pixel. The pixel is always worth installing regardless of whether you plan to run ads immediately.
How long should my retargeting window be? Depends on your sales cycle. For impulse purchases: 7–14 days. For considered purchases (services, software, high-ticket items): 30–60 days. For long sales cycles (B2B, enterprise): up to 180 days.
Will people know they're being retargeted? Facebook shows a small "Sponsored" label on all ads. Some users notice the correlation between browsing a site and seeing related ads, but most do not. What they will notice is whether your ad is relevant and useful — which is why personalised retargeting copy outperforms generic ads.
Is retargeting affected by iOS privacy changes? Yes. Apple's App Tracking Transparency (ATT) framework, introduced in iOS 14.5, reduced the accuracy of pixel-based retargeting for iOS users. Meta recommends using Conversions API (CAPI) alongside the pixel for more reliable tracking. CAPI sends conversion data directly from your server to Meta, bypassing browser-based restrictions.
Related reading: How to Advertise on Facebook | Facebook Ads vs Google Ads | What is Social Media Advertising | What is Digital Advertising