How SEO and PPC build trust across search: Case study

A prospective customer searches for software. They don’t visit your website first.

Instead, they skim AI Overviews, read a Reddit thread questioning your pricing, ask ChatGPT for recommendations, follow its suggestion to a creator’s YouTube comparison, watch a TikTok review, compare a competitor’s landing page, glance at your Google Business Profile reviews, and only then click your paid search ad.

Which channel gets credit? The answer is all of them.

Today’s search journey doesn’t follow a linear path. Every interaction contributes evidence that builds trust, making visibility across the search journey more valuable than success in any single channel. 

Optimizing for organic and paid search independently may improve individual metrics, but it often overlooks how those channels influence one another throughout the buyer’s evaluation process.

The challenge is no longer proving that SEO and PPC should collaborate. It’s measuring how much more value they create when they do.

The case study: a 26-week co-optimization strategy

To evaluate this cross-channel dynamic, an education SaaS company that helps businesses create, market, and sell online courses coordinated its SEO and PPC efforts over a 26-week engagement.

The company wasn’t facing a single performance issue. Instead, multiple friction points across the search journey were limiting visibility and reducing confidence during high-intent buying moments.

At the start of the engagement:

• Organic position: Core commercial keywords averaged an organic position of 15.2.
• Paid search CTR: Paid campaigns targeting those same themes averaged an 11.4% click-through rate.
• Branded search friction: A Reddit thread criticizing the company’s pricing ranked No. 4 for branded searches.
• Local reputation: The Google Business Profile had 37 reviews with a 3.6-star average rating.
• Backlink profile: The website had 212 referring domains.

Viewed independently, each metric pointed toward a different marketing function. Viewed together, they revealed a broader opportunity: prospective customers were forming opinions across AI answers, discussion forums, videos, reviews, paid ads, organic listings, and third-party publications long before reaching the company’s website.

Instead of assigning each issue to a separate team, the initiative followed a coordinated sequence designed to test how resolving specific friction points influenced performance across related search channels.

Dig deeper: SEO and PPC alignment starts with your org chart

Phase 1 (Weeks 1-8): Establishing reputation and authority

The engagement began by strengthening trust signals across third-party search touchpoints before driving additional traffic.

During Weeks 1 through 8, a structured review acquisition initiative grew the company’s Google Business Profile from 37 reviews, averaging 3.6 stars, to 164 reviews, averaging 4.3 stars. In parallel, a digital PR campaign secured 23 editorial placements, increasing referring domains from 212 to 235.

These efforts established credible proof points that prospective customers could encounter throughout the search journey before arriving on the website.

Phase 2 (Weeks 9-13): Commercial content gap alignment

With foundational trust signals improving, the focus shifted to aligning paid search insights with organic content priorities.

Search term reports consistently surfaced commercial modifiers, competitor comparisons, pricing questions, and feature-specific queries that weren’t fully addressed on the website. Comparing paid search demand against existing commercial content identified 11 high-intent opportunities.

During Weeks 9 through 13, high-impact commercial pages were expanded while new pages were created to address uncovered demand.

Organic performance was measured by segmenting traffic specifically to those 11 updated URLs. Over the following 13 weeks, those pages generated 8,742 organic sessions.

Following the content rollout, CPA across the corresponding paid search campaigns declined from $146 to $121. Broader account optimizations and market conditions also influence paid media performance, but the improvement coincided with tighter alignment between search intent, ad messaging, and landing page content.

Dig deeper: PPC landing pages: How to craft a winning post-click experience

Phase 3 (Weeks 14-21): Addressing third-party friction

Despite improvements in commercial search visibility, branded search analysis revealed that prospective customers searching the company’s name were still encountering a negative Reddit thread at No. 4 on page one. 

A thread in that position on a branded search can quietly undercut paid search efficiency. A buyer who clicks a high-intent ad, then searches the brand name and finds pricing complaints, may abandon the decision the ad already paid to earn.

The team published a detailed comparison video explaining the company’s pricing structure and value proposition across YouTube, TikTok, and Instagram during Weeks 14 through 21.

Over the seven weeks following its release, the video generated 81,400 views. A manual review of 340 public comments found that 265, or 77.9%, were positive, indicating the content successfully addressed pricing questions prospective buyers were actively researching.

Following the combined impact of the earlier PR campaign, review growth, and video distribution, manual SERP monitoring confirmed the Reddit thread moved from No. 4 to No. 11, shifting off Google’s first page for primary branded searches.

Dig deeper: A smarter Reddit strategy for organic and AI search visibility

Measuring total lift

Viewed independently, each initiative showed measurable progress over the 26-week engagement. Viewed holistically, the sequence revealed how performance accumulated across the entire search journey:

• Organic visibility: Core commercial keywords improved from position 15.2 to 9.7, moving priority terms onto page one.
• Paid media efficiency: Paid CTR declined to 9.8% amid broader AI Overview expansion, while paid impression share remained strong at 93%, with branded ad spend increasing just 6.2% — suggesting the paid presence continued serving as a trust anchor even as click behavior shifted industrywide.
• AI search visibility: Manual tracking across a fixed set of 42 priority commercial and comparison queries showed AI Overview citation frequency increased from 4.8%, or two of 42, to 31%, or 13 of 42.

The framework: Search marketing trust accumulation

Looking back through the lens of this engagement, the results point to a broader principle. Search performance isn’t only about channel efficiency. It’s also about how buyer confidence accumulates across search interactions.

This case study led to the development of a measurement framework referred to here as search marketing trust accumulation.

Core philosophy

Measure search the way customers experience it, not the way marketing teams organize it.

The problem

Traditional reporting evaluates performance in departmental silos:

Buyers don’t experience marketing through departmental boundaries. They experience one continuous search journey. Evaluating channels independently can overlook how those interactions collectively reduce uncertainty and build confidence before a purchase decision.

The five-step measurement process

• Map search touchpoints: Identify every meaningful search surface where buyers may encounter your brand, including organic search, paid search, AI Overviews, reviews, forums, video, and digital PR.
• Evaluate the evidence: Identify what each interaction contributes to buyer confidence. For example, organic search demonstrates relevance, reviews provide customer validation, and video helps answer evaluation questions.
• Measure trust accumulation: Shift the question from “Which channel gets conversion credit?” to “Which interactions collectively built enough confidence for the buyer to choose the brand?”
• Diagnose trust gaps: Identify where buyers encounter friction despite strong channel metrics, such as negative discussions, weak reviews, or missing comparison content.
• Optimize the search experience: Prioritize investments that strengthen the overall buyer journey rather than optimizing channels in isolation.

Search performance is bigger than any one channel

No single metric captured the full impact of this engagement because buyer confidence accumulated across multiple search interactions rather than within a single channel.

Search marketing trust accumulation provides a way to measure search the way buyers actually experience it by evaluating how coordinated search marketing efforts build confidence across the entire decision-making process, not just within individual channels.

Here’s your Monday morning checklist:

• Audit your branded page one: Search your brand name in an incognito window. What shows up in positions two through five? Are forums, video snippets, or negative reviews stealing buyer confidence before they convert?
• Mine PPC search terms for organic gaps: Pull your top 20 highest-converting paid search terms. Do you have dedicated, optimized organic pages for those exact queries?
• Break down reporting silos: Schedule a combined monthly search sync where SEO, PPC, and reputation leads review shared search surfaces rather than isolated KPIs.