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Google Ads ROI case study - Achieving 847% ROAS
Marketing

Google Ads ROI: How We Achieved 847% ROAS for an E-commerce Client

A detailed case study breaking down the exact strategies, ad copy formulas, and bidding techniques that generated $847 for every $100 spent.

Marcus Williams

Marcus Williams

Lead Strategist

12 min read

Key Takeaways

  • Account structure directly impacts performance
  • Negative keywords can save 40%+ of wasted spend
  • Smart bidding requires sufficient conversion data
  • Audience layering amplifies targeting precision
  • Systematic testing drives continuous improvement

The Challenge: Underperforming Ads#

Our client, a fashion e-commerce brand, was struggling with their Google Ads performance. Despite a $25,000 monthly budget, returns were disappointing.

Starting Point#

MetricValueIndustry Avg
ROAS180%400%
CTR1.2%2.5%
Conv. Rate1.8%3.2%
CPA$85$45

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Our 5-Phase Strategy#

Phase 1: Account Restructuring#

We reorganized the entire account architecture:

Before: One campaign with broad targeting After: Segmented campaigns by:
  • Product category
  • Search intent (branded vs. non-branded)
  • Device type
  • Geographic performance

Phase 2: Keyword Optimization#

Eliminated wasteful traffic:
  • Removed all broad match keywords
  • Added 500+ negative keywords
  • Created Single Keyword Ad Groups (SKAGs) for top performers

Impact: Wasted spend reduced by 40%

Phase 3: Ad Copy Framework#

Our winning formula for Responsive Search Ads:

Headlines:
  • 3 headlines with primary keyword
  • 3 headlines with benefits
  • 3 headlines with social proof
  • 3 headlines with urgency/offers
  • 3 headlines with differentiators

Descriptions:
  • Feature-benefit focused
  • Clear call-to-action
  • Price/offer when applicable
  • Trust signals (reviews, guarantees)

Phase 4: Smart Bidding Evolution#

We followed a systematic approach:

WeekStrategyTarget
1-2Manual CPCData collection
3-4Maximize ConversionsVolume building
5-6Target CPAEfficiency focus
7+Target ROASProfit optimization

Phase 5: Audience Layering#

We implemented sophisticated audience targeting:

  • Remarketing lists segmented by engagement level
  • Similar audiences based on converters
  • In-market audiences for relevant categories
  • Custom intent audiences from competitor keywords


Results After 90 Days#

MetricBeforeAfterChange
ROAS180%847%+370%
CTR1.2%3.8%+217%
Conv. Rate1.8%5.2%+189%
CPA$85$32-62%

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Key Lessons Learned#

  • 1$1
  • 2$1
  • 3$1
  • 4$1
  • 5$1
  • Want results like these? Get a free Google Ads audit.

    Marcus Williams

    Written by

    Marcus Williams

    Lead Strategist

    Digital strategist specializing in conversion optimization and growth marketing. Marcus combines analytical thinking with creative problem-solving to deliver measurable results. With expertise in A/B testing, funnel optimization, and data analytics, he has helped businesses increase conversions by an average of 150%.

    Growth StrategyConversion OptimizationAnalyticsA/B Testing

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