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Performance Max Setup Checklist

Configure PMax Correctly to Avoid the Week 3 Crash and Deliver Sustainable Growth

15 min readUpdated January 2026

Most PMax campaigns crash after 2-3 weeks. This checklist ensures you set up Performance Max correctly and avoid the common pitfall where great initial results suddenly decline.

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1Prerequisites Checklist

Before launching Performance Max, verify you have:

  • 50+ conversions/month on existing campaigns
  • Conversion tracking properly configured
  • Customer lists uploaded to Audience Manager
  • Backend tracking for new vs. repeat customers
  • Minimum $50-100/day budget available
  • Search campaigns already profitable (PMax isn't for beginners)

Missing items? Fix them first—PMax needs data to work.

2The Performance Max Problem

Why Initial Success Often Doesn't Last

WeekWhat HappensPerformance
1-2Warm audiences convertExcellent CPA
3-4Warm audience depletesSharp decline
5+Struggles with cold trafficPoor/stagnant

The cause: PMax prioritizes easy wins from remarketing over new customer acquisition.

Without proper configuration, Performance Max will exhaust your existing audiences (website visitors, past customers) first because they convert easily. Once depleted, the campaign struggles to find and convert cold traffic profitably.

This checklist shows you how to configure PMax to avoid this trap.

3Campaign Setup Checklist

Step 1: Create Campaign

  • ☐ Select "Performance Max" campaign type
  • ☐ Set realistic budget ($50-100/day minimum)
  • ☐ Choose "Conversions" or "Conversion value" goal

Step 2: Configure Bidding

ScenarioStrategy
Default startMaximize Conversions
After 30+ conversionsTarget CPA or Target ROAS
ScalingGradual budget increases (20%)

Step 3: Enable New Customer Acquisition (Critical!)

This is the setting most advertisers miss:

  1. Navigate to Bidding Strategy section
  2. Find "Customer Acquisition" option
  3. Select "Bid higher for new customers"
  4. Set incremental value (30-60% above existing customer value)

Example Values:

Customer TypeValue
Existing customer$100
New customer$150 (50% premium)

Step 4: Add Audience Signals

Required audiences to upload:

  • ☐ Customer list (email uploads)
  • ☐ Website visitors
  • ☐ Purchase/lead completers
  • ☐ Custom intent audiences

Purpose: Helps Google distinguish new vs. existing customers.

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4Asset Group Setup

Minimum Assets Required

Asset TypeMinimumMaximum
Headlines515
Long headlines15
Descriptions24
Images320
Logos15
Videos05

Asset Tips

  • Include variety in headlines (benefits, features, offers)
  • Use high-quality images (1200x628 recommended)
  • Add video if available (YouTube preferred)
  • Match messaging to landing page
  • Test different angles and value propositions

URL and Final URL Settings

  • ☐ Set primary Final URL
  • ☐ Review Final URL expansion settings
  • ☐ Add URL exclusions (cart, checkout, account pages)

5Brand Protection Setup

Separate Brand Traffic from PMax

This is crucial for accurate performance measurement.

Option A: Brand Exclusions in PMax

  • Add brand terms to negative keywords
  • Exclude brand search themes in asset groups

Option B: Dedicated Brand Campaigns (Recommended)

  • Create separate Brand Search campaign
  • Create separate Brand Shopping campaign (if applicable)
  • Exclude brand from PMax

Why separate: Prevents PMax from claiming easy brand conversions as new customer acquisition, giving you accurate data on actual prospecting performance.

6Advanced: Feeder Campaign Strategy

For accounts with significant spend, consider this architecture:

Campaign Architecture

TierCampaign TypePurposeBidding
1Standard Shopping (non-brand)Cold trafficAggressive
1Non-brand SearchCold trafficAggressive
2Performance MaxWarm traffic conversionConservative
3Brand campaignsBrand protectionHigh ROAS

How It Works

  1. Feeder campaigns generate new visitors
  2. Visitors enter remarketing audiences
  3. PMax converts warm traffic efficiently
  4. Brand campaigns capture branded searches

This structure ensures PMax has a steady supply of warm audiences while your prospecting campaigns handle cold traffic acquisition.

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7Monitoring Checklist

Week 1 (Daily Monitoring)

  • ☐ Ads approved and showing
  • ☐ Budget spending as expected
  • ☐ Conversions tracking
  • ☐ No unexpected issues

Week 2-4 (Every 2-3 Days)

  • ☐ CPA trend stable?
  • ☐ Conversion volume consistent?
  • ☐ Search themes relevant?
  • ☐ Asset performance review

Ongoing (Weekly)

MetricWarning SignAction
CPA50%+ increaseCheck audience fatigue
Conversion volumeDecliningReview asset freshness
New vs. repeat60%+ repeatEnable custom acquisition
ROASBelow targetTighten bidding

8Red Flags Checklist

Implement Fixes Immediately If You See:

  • ⚠️ Sharp performance drop after Week 2-3
  • ⚠️ Backend sales flat while Google shows growth
  • ⚠️ New customer count declining despite higher spend
  • ⚠️ Search themes showing irrelevant queries
  • ⚠️ Asset combinations with poor performance

Backend Tracking Setup

Track these weekly in your own systems:

MetricHow to Calculate
New customer ordersFirst-time purchasers/leads
New customer revenueRevenue from first purchases
iNCACTotal spend ÷ new customers
New vs. repeat ratioNew orders ÷ total orders

Why: Google's numbers don't show the full picture. You need backend data to verify actual new customer acquisition.

9Common PMax Mistakes

MistakeImpactFix
No customer listsCan't identify new vs. repeatUpload email lists
Brand terms includedInflates performanceSeparate brand campaigns
No custom acquisitionOver-remarketingEnable "bid higher for new"
Too many asset groupsFragments learningStart with 1-3 groups
Budget too lowNever exits learningMinimum $50-100/day
Expecting instant resultsEarly terminationAllow 4-6 weeks

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10Launch Readiness Checklist

Final Check Before Going Live

  • ☐ Conversion tracking tested
  • ☐ Customer lists uploaded
  • ☐ Asset groups complete (all minimums met)
  • ☐ Budget set correctly ($50-100/day minimum)
  • ☐ Bidding strategy selected
  • ☐ Custom acquisition enabled
  • ☐ Brand exclusions in place
  • ☐ URL exclusions configured
  • ☐ Backend tracking ready

Once all items are checked, you're ready to launch your Performance Max campaign with confidence.

Key Takeaways

PMax favors warm audiences—enable custom acquisition to balance new vs. repeat customers.

Separate brand traffic—don't let PMax claim easy brand conversions as prospecting wins.

Track backend data—Google's numbers hide repeat customer issues.

Allow 4-6 weeks—don't panic at early fluctuations or terminate too soon.

Minimum budget $50-100/day—anything less and you'll never exit learning phase.

Complete all asset minimums—meet requirements for headlines, images, and descriptions.

Customer lists are essential—upload before launch for proper new customer tracking.

Monitor weekly—watch for the Week 3 crash and take action early.

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Frequently Asked Questions

PMax prioritizes easy conversions from warm audiences (remarketing, past visitors). These convert first, showing excellent initial results. Once exhausted, the campaign struggles with cold traffic. Enable "bid higher for new customers" and upload customer lists to prevent this.