You are paying to show ads to people whose email addresses you already have.
Read that again. If you are running retargeting campaigns without suppression lists, you are spending $15-25 CPM to show display ads to contacts you could reach for free via email. Every impression served to an already-identified visitor is money you could have spent acquiring new prospects instead.
Most B2B companies run their retargeting the same way: pixel everyone, retarget everyone, hope the ads nudge some of them back. The problem is that approach treats all anonymous traffic equally. Once you can identify who your visitors actually are, the entire retargeting playbook changes.
Instead of blasting ads at everyone, you suppress the identified visitors from ad audiences and reach them directly. Then you focus your ad budget exclusively on the visitors you could not identify - the ones where paid retargeting is your only option.
This post breaks down the strategy, the math, and the implementation.
Table of Contents
- The Retargeting Waste Problem
- The Math: Ads vs. Direct Outreach
- Step 1: Identify Your Visitors
- Step 2: Build Suppression Lists
- Step 3: Upload to Ad Platforms
- Step 4: Direct Outreach to Identified Visitors
- Step 5: Focus Ad Budget on Unknown Traffic
- Advanced: Segment by Intent Level
- Real Numbers: Before and After
- FAQ
The Retargeting Waste Problem
Here is a scenario every marketing team will recognize.
You drive 10,000 visitors to your site this month. Your retargeting pixel fires on all of them. You build an audience. You run display and social retargeting campaigns against that audience. You spend $3,000-5,000 per month on those campaigns.
Now imagine you could identify 3,500 of those 10,000 visitors by name and email. With Leadpipe’s 30-40% match rate, that is a realistic number.
Those 3,500 identified contacts are sitting in your retargeting audience right now. You are paying $20 CPM to show them banner ads when you could send them a personalized email for essentially $0. You are paying for impressions when you already have the data to start a conversation.
The retargeting spend on those 3,500 identified visitors is pure waste. Not because retargeting does not work - it does. But because there is a cheaper, higher-converting channel available for those specific contacts: direct outreach.
Retargeting makes sense when you cannot reach someone directly. When you do not know who they are, a display ad is your only option for staying in front of them. But the moment you identify a visitor, retargeting becomes the second-best option. And second-best options cost you money.
The Math: Ads vs. Direct Outreach
Let’s put real numbers to this.
Retargeting an identified visitor via ads:
- CPM: $20 (Google Display) to $35 (LinkedIn)
- Average impressions to generate a click: 200-500
- Cost per click: $4-17.50
- Click-to-conversion rate: 1-3%
- Effective cost per conversion: $130-1,750
Reaching an identified visitor via email:
- Cost per contact via Leadpipe: ~$0.30 (Starter plan at $147/mo for 500 IDs)
- Email delivery cost: $0 (your existing email tool)
- Email response rate from identified visitors: 15-25%
- Effective cost per response: $1.20-2.00
The gap is not subtle. Direct outreach to identified visitors is 65-875x cheaper per conversion than retargeting them with ads.
And the response quality is different too. An ad click lands someone back on your website where they might bounce again. A direct email response starts a conversation. It creates a thread your sales team can work. The downstream conversion rate from an email reply is dramatically higher than from an ad click.
This does not mean you should stop retargeting entirely. It means you should stop retargeting the people you have already identified and redirect that budget to the visitors who remain anonymous.
Step 1: Identify Your Visitors
The foundation of this strategy is visitor identification. You need to know which visitors you can reach directly before you can suppress them from ad audiences.
Leadpipe installs in 2-5 minutes - a JavaScript pixel on your site. Once active, it identifies visitors in real-time and delivers structured data via webhook:
- email - their business email address
- first_name and last_name
- company_name - where they work
- job_title - their role
- linkedin_url - their LinkedIn profile
- page_url - what they viewed on your site
- visit_duration - how long they stayed
The webhook payload gives you everything you need to both suppress them from ad audiences and reach out to them directly.
At a 30-40% match rate, you are looking at identifying roughly one-third of your total website traffic. That is a significant chunk of your retargeting audience that you can now reach for free.
Step 2: Build Suppression Lists
A suppression list tells your ad platforms “do not show ads to these people.” You are essentially saying: “I already know who they are and have a better way to reach them.”
There are two ways to build suppression lists from identified visitors:
Option A: Email-based suppression
Export the email addresses of your identified visitors and upload them as a custom audience on Google Ads, LinkedIn Ads, and Meta. Then use that audience as an exclusion on your retargeting campaigns.
Most ad platforms can match email addresses to user profiles. LinkedIn match rates are typically 60-80% for business emails. Google and Meta match rates are lower (30-50%) but still meaningful.
Option B: CRM-synced suppression
If your identified visitors are flowing into your CRM via Leadpipe’s integrations, you can build dynamic suppression lists that update automatically. HubSpot and Salesforce both support ad audience syncing - create a list of contacts sourced from visitor identification and sync it as an exclusion audience.
Option B is better because it stays current. New identified visitors are automatically added to the suppression list without manual exports.
Step 3: Upload to Ad Platforms
Here is how suppression lists work on each major platform:
Google Ads
- Navigate to Tools & Settings -> Audience Manager
- Create a Customer List audience
- Upload your identified visitor email list
- In your retargeting campaign, add this audience as an Exclusion
- Your retargeting ads will no longer serve to matched contacts
LinkedIn Ads
- Go to Plan -> Audiences -> Matched Audiences
- Create a new audience from a Company/Contact list
- Upload the email list (LinkedIn matches on business email)
- Exclude this audience from your retargeting campaign
- Note: LinkedIn typically takes 24-48 hours to match
Meta (Facebook/Instagram)
- Navigate to Audiences in Ads Manager
- Create a Custom Audience from a Customer List
- Upload emails (and optionally names and phone numbers for better match rates)
- Exclude this audience from your retargeting ad sets
The key detail: update these lists regularly. If you are identifying 500+ visitors per month, update your suppression lists weekly or set up automatic syncing through your CRM.
Step 4: Direct Outreach to Identified Visitors
Now that identified visitors are suppressed from paid retargeting, you need an outreach channel to replace it. You have three options:
Manual outreach
Your sales team reviews identified visitors daily and sends personalized emails. Best for high-intent visitors (pricing page, case studies, comparison pages). Works well for teams with 100-200 identified visitors per month.
The advantage: every message is genuinely personal. The rep can reference exactly what the visitor looked at and tailor the conversation.
Automated nurture sequences
Identified visitors automatically enter an email drip based on the pages they visited. Blog readers get an educational sequence. Pricing page visitors get a product-focused sequence. This scales better than manual outreach and works for Tier 2-3 intent visitors.
AI-powered outreach
Use the webhook data to feed an AI agent that drafts personalized outreach based on the visitor’s behavior, company, and role. This combines the personalization of manual outreach with the speed and scale of automation.
You can build this for about $167/month total - Leadpipe for identification, OpenAI for personalization.
Try Leadpipe free with 500 leads ->
Step 5: Focus Ad Budget on Unknown Traffic
Here is where the budget savings compound.
After suppressing identified visitors, your retargeting audience is now exclusively the visitors you could not identify - the 60-70% of traffic that remains anonymous. These are the people where paid retargeting is your only option for staying in front of them.
Your retargeting campaigns just got more efficient in three ways:
Lower waste. Every impression now goes to someone you cannot reach any other way. No more paying $20 CPM to remind someone of a product when you could have emailed them directly.
Better frequency control. With a smaller retargeting audience, you can increase frequency to the visitors who need multiple touchpoints without increasing total spend.
Higher conversion rates. Counterintuitively, your retargeting conversion rate may actually improve. The identified visitors you suppressed were the ones most likely to convert through direct outreach anyway. By removing them, you are concentrating your ad budget on the harder-to-reach prospects who genuinely need the additional impressions.
The net effect: same or less total marketing spend, more total conversions, lower cost per acquisition across both channels.
Advanced: Segment by Intent Level
Not all identified visitors should get the same treatment. The data from Leadpipe’s webhook lets you segment visitors by behavior and route them accordingly.
High-intent visitors (direct sales outreach)
- Visited pricing, demo, or comparison pages
- Visit duration over 60 seconds
- Multiple visits in the past week
- Job title matches your ICP
These contacts go straight to your sales team or your automated outreach system. Suppress them from all ad campaigns. The best response you can give is a personalized email within the hour.
Medium-intent visitors (nurture sequence)
- Visited product pages or case studies
- Single visit, moderate duration
- Relevant company but unclear buying timeline
Add these to an email nurture sequence. Suppress from retargeting to avoid paying for something email handles better.
Low-intent visitors (retarget with ads)
- Blog readers
- Single-page sessions under 30 seconds
- Identified but showing no buying signals
These are the one exception where you might keep identified visitors in your retargeting audiences. They have shown minimal intent, so a gentle retargeting campaign might be more appropriate than a direct email. Use your judgment based on your sales process.
Unidentified visitors (retarget aggressively)
- The 60-70% of traffic Leadpipe could not match
- These people are unreachable by any other channel
- This is where your retargeting budget should go
Focus your highest ad spend here. Optimize for landing page visits or lead magnet downloads so you can capture their information through a form since you could not identify them passively.
Real Numbers: Before and After
Let’s model a real scenario for a B2B company spending $5,000/month on retargeting.
Before (retargeting everyone):
- Monthly visitors: 10,000
- Retargeting audience: 10,000
- Monthly retargeting spend: $5,000
- Retargeting conversions: 15 (0.15% conversion rate)
- Cost per conversion: $333
- Direct outreach: 0 (no visitor identification)
- Total conversions: 15
- Total cost per conversion: $333
After (identification + suppression):
- Monthly visitors: 10,000
- Identified visitors (35%): 3,500
- Retargeting audience (suppressed): 6,500
- Monthly retargeting spend: $3,250 (same CPM, smaller audience)
- Retargeting conversions: 10
- Leadpipe cost: $147/mo
- Email outreach conversions from 3,500 contacts: 35 (1% conversion, conservative)
- Total conversions: 45
- Total marketing spend: $3,397 ($3,250 retargeting + $147 Leadpipe)
- Total cost per conversion: $75
That is a 4.4x improvement in cost per conversion and a 3x increase in total conversions, while spending $1,603 less per month.
The savings grow as your traffic grows. At 50,000 monthly visitors, the gap between the old approach and the identification-plus-suppression approach becomes enormous.
Common Mistakes to Avoid
Mistake 1: Not updating suppression lists. If you upload a list once and never update it, new identified visitors keep getting retargeted. Set up automatic CRM syncing or commit to weekly uploads.
Mistake 2: Suppressing everyone regardless of intent. Low-intent identified visitors (blog readers who bounced quickly) might actually benefit from retargeting. Segment by intent before deciding what to suppress.
Mistake 3: Not having an outreach plan for suppressed contacts. If you suppress visitors from ads but do not reach out to them directly, you have made things worse - you removed ad impressions without replacing them with anything. Always pair suppression with direct outreach.
Mistake 4: Over-emailing identified visitors. Just because you can reach someone directly does not mean you should email them five times. One thoughtful outreach attempt plus one follow-up is sufficient. After that, add them to a low-frequency nurture drip and let the content do the work.
FAQ
How do I know which visitors have already been identified?
Leadpipe sends a webhook with full contact data every time a visitor is identified. You can store these in your CRM, a spreadsheet, or any database. The list of identified contacts is your suppression list.
What if someone is on my suppression list but has not responded to outreach?
You have two options. Keep them suppressed and continue nurturing via email (cheaper, usually more effective). Or move them back into your retargeting audience after 30 days of non-response (costs more, but adds another touchpoint). Test both approaches with your data.
Can I use this strategy with company-level identification tools?
Partially. Company-level tools like Leadfeeder or Clearbit tell you which companies visited, but they cannot give you individual email addresses for suppression or direct outreach. Person-level identification from Leadpipe makes this strategy work end-to-end.
Does this work for B2C?
The core concept (suppress identified contacts from paid retargeting) works for any business model. But the math is different for B2C because deal sizes are smaller and retargeting CPMs are lower. The strategy is most impactful for B2B where deal values justify the per-contact identification cost.
How much budget should I reallocate from retargeting to visitor identification?
Start by running both in parallel for 30 days with suppression lists active. Measure cost per conversion from each channel. Most teams find that shifting $147/month from retargeting to Leadpipe generates far more conversions than that $147 would have produced in ad spend.
