Building Retargeting Audiences: Website, Email, Video, and Social Engagement

Retargeting effectiveness depends entirely on the quality and specificity of your audiences. Most marketers build a single retargeting audience (all website visitors, last 30 days) and call it done. This is like fishing with a net that catches everything from tuna to trash. Strategic audience building separates high-performing retargeting from mediocre retargeting.

This guide covers every retargeting audience source available across major ad platforms, how to build each one, and how to use them in your campaign strategy.

Source 1: Website Visitor Audiences

Website retargeting is the foundation. It captures everyone who visits your site and allows you to segment them by behaviour.

Building Website Audiences

All major platforms support website retargeting through their respective pixels:

• Meta: Meta Pixel fires events that build Custom Audiences in Ads Manager. Go to Audiences, Create Custom Audience, select Website, and define your segment.
• Google: Google Ads remarketing tag populates audience lists in Google Ads. Go to Tools, Audience Manager, and create segments based on page visits or events.
• LinkedIn: LinkedIn Insight Tag builds Matched Audiences. Go to Campaign Manager, Plan, Audiences, and create a website audience.

Website Audience Segments to Build

Do not create just one "all visitors" audience. Build these specific segments:

All Website Visitors (1-180 days): Your broadest retargeting pool. Use for general brand awareness retargeting and as a base for lookalike audiences. Create at 30, 60, 90, and 180-day windows.

High-Intent Page Visitors: Visitors to pricing pages, demo request pages, contact pages, product comparison pages. These pages signal active evaluation. Create at 7 and 14-day windows since intent decays quickly.

Content Consumers: Visitors to blog posts, resource pages, case studies. These are top-of-funnel visitors who are researching but not yet evaluating. Create at 30-day windows.

Returning Visitors: People who visited two or more times. Repeat visits indicate genuine interest. Most platforms allow you to filter by visit frequency.

Time-on-Site Segments: In Google Analytics 4, create audiences based on session duration. Visitors who spent more than 2 minutes are significantly more engaged than those who bounced in 10 seconds. Export these audiences to Google Ads.

Converters (Exclusion Audience): People who already converted (purchased, submitted a form, signed up). Always create this audience and use it as an exclusion in prospecting and upper-funnel retargeting campaigns. Use it as a positive audience for upsell and cross-sell campaigns.

URL-Based Segmentation

Most platforms allow you to define audiences by URL patterns. Use this to create product category audiences, service line audiences, or geo-specific audiences based on which pages visitors viewed. For example:

• Visitors to /products/crm-software/ get retargeted with CRM-specific ads
• Visitors to /industries/healthcare/ get retargeted with healthcare case studies
• Visitors to /pricing/ get retargeted with bottom-funnel offers

Source 2: Email List Audiences

Your email list is one of your most valuable retargeting assets. By uploading email lists to ad platforms, you can target your subscribers and customers across paid channels.

How Email Audience Matching Works

You upload a list of email addresses (and optionally phone numbers, names, and other identifiers). The platform hashes this data and matches it against its user database. Match rates vary:

• Meta: 60-80% match rate for Indian email lists
• Google: 50-70% match rate (requires Customer Match eligibility)
• LinkedIn: 40-60% match rate (professional emails match better than personal)

Email Segments to Upload

Full Subscriber List: Your entire opted-in email list. Use for broad retargeting and as a seed for lookalike audiences.

Engaged Subscribers: People who opened or clicked emails in the last 90 days. These are active and engaged; they are more likely to respond to paid retargeting as well.

Unengaged Subscribers: People who have not opened emails in 90+ days. Retarget them through paid channels as a re-engagement strategy. Sometimes a paid ad breaks through when email does not.

Customer List: People who have purchased or signed contracts. Use for upsell campaigns, loyalty offers, and as a seed for high-value lookalike audiences.

Lead Stages: If your CRM tracks lead stages (MQL, SQL, opportunity, closed-won, closed-lost), upload each stage as a separate audience. Retarget stalled MQLs with nurture content. Retarget closed-lost opportunities with new offers or product updates.

Email Retargeting Best Practices

• Update email lists at least monthly to keep match rates high
• Remove bounced and unsubscribed emails before uploading
• Use SHA-256 hashing when uploading manually (platforms hash automatically through their interfaces)
• Combine email audiences with platform-native audiences for maximum reach

Source 3: Video Engagement Audiences

Video creates one of the richest retargeting signals because viewing duration directly indicates interest level. All three major platforms support video engagement audiences.

Meta Video Audiences

Meta allows you to create audiences based on video views across Facebook and Instagram. The segmentation options are powerful:

• People who watched at least 3 seconds (basic awareness signal)
• People who watched at least 10 seconds (interest signal)
• People who watched at least 25% of the video
• People who watched at least 50% of the video (strong interest)
• People who watched at least 75% of the video (high intent)
• People who watched 95% or more (very high intent)

For retargeting purposes, the 25%+ and 50%+ viewers are the most valuable segments. They watched enough to demonstrate genuine interest but did not necessarily take a next step.

YouTube Video Audiences (Google Ads)

YouTube audiences in Google Ads allow you to retarget based on:

• Viewed any video from your channel
• Viewed specific videos
• Viewed any video as an ad
• Subscribed to your channel
• Visited your channel page
• Liked or shared a video

YouTube retargeting is particularly effective because video viewers have invested significant attention. A viewer who watched a 5-minute product demo is deeply engaged.

LinkedIn Video Audiences

LinkedIn supports video view audiences at 25%, 50%, 75%, and 97% completion thresholds. Given LinkedIn's B2B context, even a 25% viewer of a business-focused video is a meaningful retargeting prospect.

Video Audience Strategy

Build a funnel using video engagement levels:

1. Run a top-of-funnel video campaign (educational, thought leadership)
2. Retarget 25%+ viewers with a mid-funnel video (case study, product demo)
3. Retarget 50%+ viewers of the mid-funnel video with a bottom-funnel offer (demo, free trial, consultation)

This creates a self-qualifying funnel where each stage filters for increasing intent. By the time someone reaches the bottom-funnel offer, they have watched minutes of your content and are highly qualified.

Source 4: Social Engagement Audiences

Social engagement audiences capture people who interacted with your brand on social platforms, even if they never visited your website.

Meta Engagement Audiences

Meta offers these engagement-based Custom Audiences:

• Facebook Page Engagement: People who liked, commented, shared, or clicked on any post on your Facebook Page. Available at 30, 60, 90, 180, and 365-day windows.
• Instagram Account Engagement: People who engaged with your Instagram profile, posts, or ads.
• Lead Form Engagement: People who opened but did not submit a lead form. This is a high-intent audience since they started the conversion process.
• Instant Experience Engagement: People who opened your Canvas/Instant Experience ad.
• Shopping Engagement: People who interacted with your Facebook or Instagram Shop.

LinkedIn Engagement Audiences

LinkedIn supports these engagement audiences:

• Single Image Ad Engagement: People who clicked or engaged with your single image ads
• Lead Gen Form Engagement: People who opened or submitted lead gen forms. The "opened but not submitted" segment is extremely valuable for retargeting.
• Company Page Engagement: People who visited or engaged with your LinkedIn Company Page
• Event Engagement: People who registered for or attended your LinkedIn Events

Why Social Engagement Audiences Matter

Social engagement audiences are important for three reasons:

1. They capture interest from people who never visit your website (your pixel misses them entirely)
2. They are platform-native, so match rates are 100% (unlike email uploads)
3. They include engagement signals (likes, comments, shares) that indicate positive sentiment, not just passive exposure

Source 5: Customer and CRM Data

Beyond email lists, your CRM contains rich segmentation data that can power sophisticated retargeting.

CRM Segments for Retargeting

• High-Value Customers: Top 20% by lifetime value. Retarget with premium upsell offers and exclusive content.
• At-Risk Customers: Customers showing signs of churn (decreased usage, support tickets, expired subscriptions). Retarget with retention offers.
• Referral Sources: Customers who have referred others. Retarget with referral programme promotions to incentivize more referrals.
• Industry Verticals: Segment customers by industry and use each segment as a seed for industry-specific lookalike audiences.

Combining Audience Sources for Maximum Impact

The real power emerges when you combine multiple audience sources:

Combination 1: Website pricing page visitors (last 14 days) INTERSECTED with email subscribers who opened a product email. This is an ultra-high-intent audience that is actively evaluating your product from multiple channels.

Combination 2: Video viewers (50%+ of product demo) who are NOT in your email list. These are interested prospects who have not yet entered your funnel through other means.

Combination 3: Social engagement audience (last 90 days) MINUS website visitors. These are people who know your brand from social but have never visited your site. Retarget them with content designed to drive a first website visit.

Combination 4: Cart abandoners (last 7 days) PLUS email non-openers (last 30 days). People who are interested in buying but are not responding to email. Paid retargeting may be the only channel that reaches them.

Audience Size Guidelines

For retargeting audiences to be effective, they need minimum sizes:

If your segments are too small, combine them. A pricing page visitor audience with only 200 people will not deliver well on any platform. Merge it with a broader "high-intent pages" audience to reach the optimization threshold.

Audience Hygiene and Maintenance

Retargeting audiences degrade over time. Implement these maintenance practices:

• Monthly email list refresh: Upload updated CRM data to all platforms monthly
• Quarterly audience audit: Review all active audiences, delete unused ones, and consolidate overlapping segments
• Conversion exclusion updates: Ensure your converter exclusion lists are current so you are not retargeting converted customers with acquisition messaging
• Window length review: Evaluate whether your audience windows are appropriate. If your sales cycle is 60 days, a 30-day retargeting window is too short.

Conclusion

Building retargeting audiences is an ongoing discipline, not a one-time setup. The companies that invest in creating detailed, multi-source audience segments see dramatically better retargeting performance than those relying on a single "all visitors" audience.

Start with website audiences, add email and CRM data, layer in video and social engagement, and then combine them strategically. Each new audience source adds another dimension of intent data that makes your retargeting smarter and more effective.

AnantaSutra helps companies across India build comprehensive retargeting audience architectures that span every major platform. From pixel implementation to CRM integration to audience strategy, our team ensures your retargeting reaches the right people with the right message. Contact us to audit your current retargeting audiences and uncover opportunities for improvement.