The ultimate guide to ROAS optimization through first-party data integration

Lucy McCormick

By Lucy McCormick
12 Mar 2025


5 min read

Contents

Return on ad spend (ROAS) optimisation is one of the North Star metrics for any marketer running paid campaigns.

However, evolving data privacy laws and the deprecation of third-party cookies make traditional attribution models less reliable, meaning the results you see might not always be painting the full picture.

But there is a way for marketers to stay ahead, and that involves shifting to first-⁠party data integration. Taking this approach enables marketers to provide direct customer insights to bidding platforms which fuels a solid data-driven ad strategy.

So, keep reading to explore how leveraging first-⁠party data can lead to better ROAS optimization and smarter campaign decisions.

Bid-Smarter-Cheat-Sheet-Infinity-2024
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Bid Smarter: Improving paid media performance with conversion data

Why first-⁠party data is key in ROAS optimization

The decline of third-party data

Third-party data sources are becoming less reliable due to:

  • Stricter privacy regulations (GDPR, CCPA, etc.)
  • Phasing out of third-party cookies by major browsers
  • Increased demand for transparent, consent-driven marketing

As a result, it’s no wonder marketers are turning to first-⁠party data to enhance targeting, attribution, and budget efficiency. Why I hear you ask? Well, first-⁠party data provides the most accurate, privacy-compliant insights into customer behavior.

Unlike third-party data, which can be unreliable, first-⁠party data comes straight from your audience. This makes it a valuable data source that’ll help you nail personalized experiences that’ll in turn give your conversion rates a shot in the arm.

The power of first-⁠party data

The power of first-⁠party data lies in the rich insights collected directly from customer interactions. In other words, it gives marketers a direct line to customer intent. We’re talking things like:

  • Website behaviour: Clicks, form fills, logins, and browsing patterns that reveal intent
  • Call tracking software insights: Phone conversions, conversation analytics, and call outcomes that highlight high-value leads
  • CRM data: Customer preferences, past purchases, and lifecycle stages to fuel hyper-personalized marketing

By integrating these data points, marketers get a complete view of the customer journey – not just a slice of it. With this intel, it’s much easier to reduce wasted spend, drive higher engagement, and take ROAS optimization to the next level.

The role of first-⁠party data integration in marketing

Smarter audience targeting

Because first-⁠party data enables more accurate audience segmentation, it’s much easier for marketers to:

  • Identify high-intent users
  • Personalise messaging based on actual customer behavior
  • Enhance ad targeting for higher conversion rates
  • Drastically improve overall PPC Performance

To add to that, marketers using first-⁠party data integration with platforms like Google Ads and Meta can also:

  • Optimize bidding strategies based on real conversion data
  • Feed offline conversions into ad algorithms to improve automated campaign decisions
  • Reduce wasted ad spend by focusing on high-value interactions

Smart Outcomes: Enhancing ROAS through AI and first-⁠party data

Leveraging AI-powered call tracking

Call tracking platforms play a vital role in capturing offline conversions, which are often missing from digital attribution models. But with the rise of AI-powered solutions like Infinity’s Smart Outcomes, you can take this even further by:

  • Identifying call intent and outcomes that matter most i.e., sales and conversions
  • Automatically feeding call conversion data directly into bidding algorithms tools
  • Reducing CPL while maximising ROAS by prioritizing activities that drive leads
Smart Outcomes How-it-Works
Free resource

Smart Outcomes product guide

for  marketers

Data-driven decision making

By integrating AI-powered call tracking software with CRM and PPC tools, marketers gain real-time insights into customer interactions. This helps to:

  • Improve cross-channel attribution
  • Refine audience targeting based on real engagement
  • Continuously optimise campaigns for maximum efficiency

Keen to start using first-⁠party data for ROAS optimization?

If you’re keen to start making the most of your first-⁠party data to give your ROAS optimization a boost, consider some of these steps:

1 Get started with call tracking software

Use a call tracking software solution to make sure all inbound calls are tracked and attributed back to the marketing activities that led to them.

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The best call tracking software for marketers

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2 Integrate first-⁠party data with PPC and analytics platforms

Use tools that seamlessly sync customer insights with Google Ads, Meta, and CRM software so you can use quality first-⁠party data across all platforms.

3 Use AI to identify high-value leads

Let AI-driven analytics categorize call outcomes and identify callers with strong purchase intent.

4 Monitor conversion trends, test audience segments, and adjust bidding to maximize ROAS.

Marketers who prioritize first-⁠party data integration will outperform competitors relying on outdated attribution models. By embracing AI-driven call tracking and real-time data insights, marketing teams can maximise budget efficiency, enhance PPC performance, and improve ROAS. What’s not to like?

Ready to unlock real audience insight at scale?

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