Handbook
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Growth & Marketing
Paid Acquisition: Getting Started Without Burning Cash
Paid ads can accelerate growth—or drain your bank account. Here's how to test and scale paid acquisition responsibly.
Paid acquisition lets you buy growth. Unlike organic channels that take months, paid ads can drive traffic tomorrow. But they can also burn through cash quickly if you don’t know what you’re doing.
Here’s how to approach paid acquisition as a startup.
When to Use Paid Acquisition
Right Time
You have product-market fit. Paid acquisition is an accelerant. Don’t pour gas on a fire that isn’t burning.
Your conversion funnel works. If your landing page doesn’t convert, paid traffic just means faster cash burn.
You can measure results. Attribution must be in place. You need to know what’s working.
Unit economics can work. Run the math: can you acquire customers profitably at reasonable scale?
Wrong Time
Pre-PMF exploration. Use paid ads to test landing pages and messages, but not for customer acquisition at scale.
Broken funnel. Fix conversion first. Paid traffic into a leaky funnel is waste.
No attribution. If you can’t measure, you can’t optimize.
Unsustainable economics. If CAC > LTV by too much, paid acquisition loses money.
Paid Channel Options
Search Ads (Google, Bing)
People searching for what you offer. Highest intent.
Best for:
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Products people actively search for
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High-consideration B2B
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Capturing existing demand
Pros:
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High intent (they’re looking for you)
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Measurable
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Scalable (up to search volume)
Cons:
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Can be expensive (competitive keywords)
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Limited volume (capped by search demand)
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Requires keyword management
Social Ads (Meta, LinkedIn, TikTok)
Interrupting people based on targeting. Demand creation.
Best for:
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Brand building
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Creating demand (people didn’t know they wanted it)
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Visual/emotional products
Pros:
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Sophisticated targeting
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Large audiences
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Good for awareness and consideration
Cons:
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Lower intent (interruption, not search)
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Creative-dependent (requires good ads)
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Attribution challenges
Retargeting
Showing ads to people who’ve already visited your site.
Best for:
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Bringing back visitors who didn’t convert
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Nurturing consideration-stage prospects
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Upselling existing customers
Pros:
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Highly targeted (they’ve shown interest)
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Usually high ROI
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Works across channels
Cons:
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Limited audience (only past visitors)
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Can feel creepy if overdone
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Privacy changes impacting effectiveness
Display and Programmatic
Banner ads across websites.
Best for:
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Brand awareness
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Large-scale reach
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Retargeting
Pros:
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Low cost per impression
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Wide reach
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Good for awareness
Cons:
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Low engagement (banner blindness)
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Harder to attribute
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Quality varies wildly
Starting with Paid Acquisition
Start with Search
For most startups, Google Ads is the best place to start:
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Highest intent traffic
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Clear measurement
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Immediate feedback
Set Up Properly
Conversion tracking: Track the actions that matter (signups, demos, purchases).
Attribution: Understand how you’ll attribute conversions.
Landing pages: Create dedicated pages for paid traffic (don’t send to your homepage).
Budget Appropriately
Start small: $1K-5K for initial testing.
Test duration: Run tests for 2-4 weeks minimum.
Statistically significant: Wait for enough conversions to draw conclusions.
Structure Campaigns
By intent: Separate high-intent keywords from broad awareness.
By product/offering: Different campaigns for different products.
By funnel stage: Awareness, consideration, decision.
Google Ads Fundamentals
Keyword Match Types
Exact match: [keyword] — Only this exact term
Phrase match: “keyword” — Contains this phrase
Broad match: keyword — Related terms (use carefully)
Start with exact and phrase. Broad can waste budget.
Campaign Structure
Campaign (budget, settings)
└── Ad Group (related keywords)
├── Keywords
└── Ads
Group related keywords that share ad copy.
Ad Copy Best Practices
Headlines: Include keyword, highlight benefit, create urgency.
Descriptions: Expand on value prop, include call to action.
Extensions: Use sitelinks, callouts, structured snippets.
Test multiple ad variations. Let data pick winners.
Bidding Strategies
Manual CPC: Full control, but labor-intensive.
Target CPA: Set target cost per conversion; Google optimizes.
Target ROAS: Set target return on ad spend.
Start with manual or target CPA. Requires conversion data to work.
Quality Score
Google’s rating of your ad relevance (1-10).
Higher quality score = lower costs + better positions.
Improve by:
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Tightly themed ad groups
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Relevant ad copy
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Good landing page experience
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Strong click-through rate
Meta (Facebook/Instagram) Ads
Audience Targeting
Demographics: Age, location, gender, language.
Interests: Based on behavior and engagement.
Behaviors: Purchase behavior, device usage.
Custom audiences: Your data (email lists, website visitors).
Lookalikes: People similar to your customers.
Creative Best Practices
Visual matters more on social:
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Eye-catching imagery
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Clear value prop
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Mobile-first design
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Video often outperforms static
Test multiple creative variations.
Campaign Objectives
Match objective to goal:
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Awareness: Brand recognition
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Consideration: Traffic, engagement, video views
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Conversion: Purchases, leads
Optimize for what you actually want.
The Learning Phase
Meta campaigns need ~50 conversions per week to optimize well.
During learning phase:
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Don’t make major changes
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Performance will be volatile
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Wait for stabilization
Measuring Paid Acquisition
Core Metrics
Cost Per Click (CPC): What you pay per click.
Click-Through Rate (CTR): Clicks / Impressions.
Conversion Rate: Conversions / Clicks.
Cost Per Acquisition (CPA): Cost / Conversions.
Return on Ad Spend (ROAS): Revenue / Spend.
The Metrics That Matter
CPA and ROAS are what count. Everything else is intermediate.
Can you acquire customers profitably? That’s the question.
Attribution Challenges
Last click: All credit to last touch before conversion.
Multi-touch: Credit spread across touches.
View-through: Credit for seeing (not clicking) ad.
No attribution model is perfect. Be consistent and understand limitations.
Tracking Setup
Ensure proper tracking:
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Google Analytics connected
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Conversion pixels installed
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UTM parameters on all links
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Server-side tracking if possible (privacy changes impacting client-side)
Scaling Paid Acquisition
When to Scale
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CPA is within target
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Enough conversion volume for statistical confidence
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Unit economics work at scale
How to Scale
Increase budget gradually: 20-30% increments.
Expand keywords/audiences: More keywords, broader targeting.
New channels: After mastering one, add another.
Better creative: Refresh and test new approaches.
Scaling Challenges
Diminishing returns: Costs often increase as you scale.
Audience saturation: Limited pool of high-intent prospects.
Creative fatigue: Ads lose effectiveness over time.
Plan for efficiency to decrease as you scale. Factor this into projections.
Common Mistakes
Launching Without Tracking
Running ads without proper conversion tracking is burning money blindly.
Fix: Set up tracking before spending a dollar.
Giving Up Too Early
Stopping campaigns before statistical significance.
Fix: Run tests long enough to draw conclusions (typically 2-4 weeks, 100+ conversions).
Not Testing Creative
Running one ad variation and hoping it works.
Fix: Test multiple headlines, images, copy variations. Let data decide.
Ignoring Landing Pages
Driving traffic to generic pages that don’t convert.
Fix: Create dedicated landing pages matched to ad intent.
Scaling Too Fast
Doubling budget overnight and wondering why efficiency tanked.
Fix: Scale gradually (20-30% increases) and monitor impact.
Broad Targeting Too Early
Starting with broad keywords or audiences.
Fix: Start narrow and specific. Expand as you learn.
Paid Acquisition Economics
Unit Economics Math
LTV = Average revenue per customer × Gross margin
Target CAC = LTV / 3 (rough rule of thumb)
If LTV is $3,000 with 70% margin, effective LTV is $2,100. Target CAC: ~$700.
Payback Period
How long to recover CAC from a customer’s payments.
Payback = CAC / (Monthly revenue per customer × Gross margin)
Shorter payback = faster cash recycling = more aggressive scaling possible.
Blended vs. Channel CAC
Channel CAC: Cost per acquisition from a specific channel.
Blended CAC: Total marketing spend / Total new customers.
Understand both. Channel CAC shows efficiency. Blended CAC shows overall health.
Key Takeaways
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Only use paid acquisition after PMF with a working funnel
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Start with search ads (Google)—highest intent, most measurable
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Set up conversion tracking before spending a dollar
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Start small ($1K-5K), test for 2-4 weeks, then scale what works
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CPA and ROAS are the metrics that matter—everything else is intermediate
•
Scale gradually (20-30% budget increases) and monitor efficiency
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Landing pages matter as much as ads—match them to intent
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Expect diminishing returns as you scale—build this into projections
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Attribution is imperfect; be consistent in how you measure
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