The Rise of AI Search: How ChatGPT, Perplexity and Google AI Overviews Are Reshaping PPC

 

For the first time in roughly twenty years, the way people find information online is meaningfully changing — not evolving incrementally, but fundamentally shifting. AI-powered search experiences from ChatGPT, Perplexity, and Google's own AI Overviews are altering the search experience in ways that directly affect the economics of paid search advertising.

If you manage Google Ads budgets, this is not a distant concern to monitor. It is happening now, and the advertisers who adapt fastest to where high-value search attention is moving will build a substantial competitive advantage.

What Is Changing About Search Behavior

Traditional search is a two-step process: you type a query, receive a list of results, and click through to a website. AI search collapses this into a single step. Users receive a synthesized, conversational answer directly on the results page — no clicking required.

Google's AI Overviews have been rolling out progressively across high-intent informational queries throughout 2024 and 2026. Early data from multiple research groups suggests queries with AI Overviews generate meaningfully lower click-through rates to organic results positioned below the overview. The advertiser impact varies by query type and ad position, but the trend is clear: AI Overviews are absorbing click intent for a significant portion of informational searches.

How Each AI Search Platform Is Evolving

Google AI Overviews

Google's AI Overviews appear at the top of search results for informational queries, synthesizing answers from multiple sources. Ads continue to appear above Overviews in many cases, but the traditional organic results that advertisers have always competed with for user attention are being pushed significantly further down the page. Brands mentioned favorably within an Overview receive exposure without paid placement — a form of AI-driven brand visibility that doesn't show up in standard impression metrics.

ChatGPT Search

OpenAI's integrated search product now allows ChatGPT users to query the web directly within their conversations. ChatGPT Search is showing early signs of meaningful user adoption, particularly among tech-forward demographics. While ChatGPT's search advertising model is still nascent, the platform is becoming a first-stop information source for a growing segment of high-value users, pulling them away from traditional Google searches where your ads currently appear.

Perplexity

Perplexity has launched a sponsored questions advertising model, allowing brands to appear in answers to queries in their category. It is a small but growing platform with an audience that skews heavily toward research-oriented, high-income users. For brands in complex B2B categories, financial services, or technology, Perplexity advertising is worth testing as search behavior continues to fragment.

What This Means Specifically for Google Ads Performance

Informational Query Traffic Is Declining

If your Google Ads campaigns target top-of-funnel informational keywords — 'how to choose accounting software,''what is the best CRM for small business,''how does mortgage refinancing work' — AI Overviews are likely already reducing your impression-eligible traffic on these terms. Users who receive a satisfactory answer from an AI Overview have no reason to click your ad. Expect traffic to continue declining on broad informational terms as AI Overviews expand.

Bottom-Funnel Transactional Clicks Are More Valuable Than Ever

Commercial and transactional queries are largely unaffected by AI Overviews because they require a transaction, not an answer. When someone searches 'book emergency plumber London tonight' or 'buy running shoes size 11 free delivery,' they need to complete an action — not read a summary. These clicks remain high-value, and competition for them is increasing as advertisers shift budgets away from informational terms toward transactional ones.

How to Adapt Your PPC Strategy for the AI Search Era

•       Conduct an intent audit of your entire keyword portfolio. Classify every keyword as informational, commercial investigation, or transactional. Shift budget decisively toward transactional and commercial investigation terms.

•       Reduce bids or pause keywords that are purely informational and likely to be answered by AI Overviews. Reallocate that budget to high-intent terms where clicks still dominate the user journey.

•       Invest in Shopping and visual ad formats. AI Overviews do not currently replace product discovery for tangible goods — Shopping ads remain highly effective and AI-overview-resistant.

•       Build brand authority that earns inclusion in AI Overview citations. Content that is authoritative, well-structured, and specifically answers user questions is more likely to be cited in AI responses.

•       Monitor Search Impression Share by query type monthly. Declining impressions on informational terms is an early warning signal of AI Overview impact on your specific category.

•       Test YouTube and Display as reach channels. As AI captures more of the search answer experience, paid reach on YouTube and Display becomes more valuable for brand building and remarketing.

The Bottom Line

The PPC playbook is not being discarded. It is being fundamentally refined. The advertisers who will win the next phase of paid search are those who move quickly toward high-intent, transactional-heavy keyword portfolios, build first-party audiences that allow precise targeting independent of search volume, and develop brand authority strong enough to earn organic inclusion in AI search answers.

The AI search disruption is real. But so is the opportunity to build a more durable, higher-converting paid search strategy in response.