Your Paid Search Campaigns Didn't Break. The Decision Did.

The marketing funnel didn't get longer. It got hijacked.

Not by a competitor. Not by a platform update. By a fundamental change in how buyers build their shortlists, and it happened quietly, upstream of everything you've been optimizing.

Before anyone types a query into Google, a growing share of your potential buyers have already had a conversation with an AI assistant. They've described their problem. Gotten a framework. Narrowed their options. In some cases, they've already decided who they're willing to talk to.

Bain & Company found that 44% of online buyers now mostly start their journey in an LLM or split their search between AI tools and traditional search engines. Bain's research also found that buyers at small and medium-sized businesses have already begun building their vendor shortlists inside LLMs, using AI to construct the consideration set, then turning to websites and review platforms to validate. If a vendor's brand doesn't surface in that first AI-generated list, it may never make it to the validation stage.

By the time your ad appears, you're not competing for consideration. You're competing for confirmation.

That's a different game. And most paid search strategies aren't built for it.

What the Numbers Are Actually Telling You

CPCs are up. Among B2B non-branded Google Search campaigns, cost per click jumped approximately 29% between August 2024 and July 2025, while CTR dropped 26% over the same period. Cost per click increased for 87% of industries in the period April 2024 through March 2025.

Most teams read those numbers as a campaign problem. Tighten the keywords. A/B test the headlines. Squeeze a few more points of Quality Score.

That's not wrong. But it's treating a symptom.

You're paying more per click to reach buyers who made up their minds somewhere you weren't.

The deeper issue is that the SERP is no longer where consideration happens. AI tools absorbed that stage. The click arriving at your landing page is coming from a buyer who's further along in their decision than your campaign had anything to do with, and that's exactly why the numbers look the way they do.

Bain & Company found that 60% of searches now terminate without the user clicking through to any website, and that 80% of consumers rely on AI-written results for at least 40% of their searches. A Pew Research Center study using actual browsing data confirmed that only 8% of users clicked a traditional result when an AI summary was present, compared to 15% without one. 26% ended their session entirely after seeing an AI summary.

Paid Search Still Works. Here's Where.

None of this makes paid search obsolete. For brands without strong organic or AI visibility, it's still the fastest way to get in front of active demand. For local, transactional, and time-sensitive categories, intent on the SERP is still real and still convertible.

But it's no longer a standalone demand capture strategy for every business. It's a piece of a system.

The brands getting the most out of paid search right now are the ones who've accepted this shift and adjusted accordingly. They're not just optimizing bids. They're thinking about what happens before the click and who they're reaching when it finally arrives.

Specifically, they're asking three questions most advertisers aren't.

1. Are we visible where the consideration is happening? 

If AI tools are answering questions in your category before anyone searches, your brand needs to be part of that answer. That's a content and authority problem, not a paid problem. But it directly affects how hard your paid campaigns have to work. Seer Interactive found that brands cited within AI Overviews experienced 91% higher paid CTR compared to non-cited brands on the same queries.

Organic presence and AI citation aren't just an SEO concern. They're a paid efficiency problem.

2. Does our landing page match the mindset of a validator, not an explorer?

Buyers arriving from AI-influenced journeys don't need you to explain the category. They need to clearly see why you're the right choice, what working with you actually looks like, and what happens after they raise their hand. Less education. More proof.

3. Are we attributing correctly in a longer journey? 

If your paid campaigns are only getting credit for direct conversions, you're probably undervaluing them and over-optimizing toward a narrow definition of performance.

Multi-touch attribution isn't a nice-to-have anymore. It's how you stop penalizing channels that are actually working.

The Metric to Watch

Click-through rate was always a flawed proxy for intent. It's even less reliable now.

Seer Interactive analyzed over 25 million organic and 1.1 million paid impressions from June 2024 to September 2025 and found that paid CTRs on queries where Google AI Overviews appeared fell 68%, dropping from 19.7% to 6.34%.

Critically, even queries without AI Overviews saw significant paid CTR declines, suggesting the behavioral shift extends beyond Google's own features to how and where people are doing their research before they ever search.

What you want to track is the quality of what's arriving. Not just volume. Not just cost per click. Conversion rate by traffic source. Lead quality scores. Time to close by channel. Close rate compared to organic or referral traffic.

If your paid traffic is converting at a lower rate than it used to, and the creative and landing page haven't changed, that's diagnostic information. It's telling you the buyers arriving through paid are later in a journey that started somewhere else, and your campaign wasn't there for it.

If your paid campaigns are only getting credit for direct conversions, you're making budget decisions on incomplete data.

That's the gap worth closing.

What to Do Right Now

The shift doesn't require burning down your paid strategy. It requires expanding your thinking about where demand lives and what paid search's job is within that.

Start with an honest assessment of your funnel.

• Where are your best buyers actually forming opinions about your category?

• Where does your brand show up in that process, and where is it absent?

• What does a visitor from paid search find when they arrive, and does it match where they are in the decision?

Paid search spending that isn't supported by broader visibility, credible content, and a clear post-click experience is working against itself. It's paying to reach people who've already decided, without having done anything to influence that decision.

The advertisers who figure this out first have a real advantage. The ones who keep optimizing campaigns in isolation are going to keep wondering why it feels like the system is fighting them.

It's not the system. It's the sequence.

The way buyers research and decide has changed. Your measurement needs to catch up before your budget does.

If you want to pressure-test how AI visibility is affecting your paid strategy, let's look at it together.

Sources

1. Dreamdata. B2B Google Search Ads Benchmark: Rising CPC, Falling CTRs, and Shrinking Budgets. September 2025. dreamdata.io

2. WordStream / Marino, S. Google Ads Benchmarks 2025. September 2025. wordstream.com

3. Bain & Company. Consumer Reliance on AI Search Results Signals New Era of Marketing. February 19, 2025. bain.com

4. Bain & Company. Your Next Customer Will Find You Using AI. Now What? September 2025. bain.com

5. Seer Interactive. AIO Impact on Google CTR: September 2025 Update. November 4, 2025. seerinteractive.com

6. Pew Research Center. Do People Click on Links in Google AI Summaries? July 2025. pewresearch.org