WPP Media's June 2026 midyear forecast names generative AI search the fastest-scaling ad channel in history, going from $5.1B to $100B by 2030. Here is what it means for service businesses.
Ido Cohen · Published 2026-06-17 · Paid Advertising
The world's largest advertising holding company just put a number on what most service business owners have only felt in their gut: AI search advertising is about to eat a massive chunk of every marketing budget on earth, and it is happening faster than any ad channel in recorded history.
On June 16, WPP Media published its midyear "This Year Next Year" global ad forecast — the same report the industry has used to set budgets for two decades — and for the first time ever, it broke out generative AI search as its own standalone advertising category. The verdict: generative search is on track to grow from $5.1 billion in revenue this year to more than $100 billion by 2030, a trajectory that WPP's own analysts describe as the fastest-scaling advertising channel on record. If you run a plumbing company, a med spa, a law firm, or any other local service business, this report is not a think piece about the future. It is a budget memo for right now.
WPP Media is not a tech blog speculating about ChatGPT. It manages more than $60 billion in annual media spend on behalf of the world's largest brands, and its "This Year Next Year" report is the closest thing the ad industry has to a shared GPS.
According to Digiday's coverage published June 16, WPP's latest ad spend forecasts highlight AI search as the fastest growing investment area in advertising. The report defines "generative search" as advertising revenue generated through what WPP calls "AI-mediated discovery environments" — paid placements and ad impressions served inside AI-generated search experiences and standalone conversational AI products such as Google AI Overviews and ChatGPT.
The numbers are striking. WPP Media forecasts global generative search advertising revenue will reach $5.1 billion in 2026, representing around 0.4% of total advertising revenue, before growing at an almost 100% compound annual growth rate over the following five years, according to Marketing Week's coverage. Within the search category specifically, generative search is projected to account for 1.9% of revenues in 2026, rising to 39.2% by 2031.
Why does this matter so much? Because those percentages are going to be fought over by millions of advertisers simultaneously. Right now, before the competition fully arrives, is the best time to establish a position.
"AI search ads" is not one product. It is currently three distinct platforms with very different access models, costs, and audiences — and service businesses need to understand all three.
1. Google AI Overviews & AI Mode ads
This is already live and already eating your clicks. According to Digital Applied's analysis, ads now appear alongside 25.5% of all AI Overview responses in Google Search, up from just 5.17% in early 2025. Google has launched shopping ads with Direct Offers inside AI Mode. If you already run Google Ads, your campaigns are automatically eligible to appear inside AI Overviews — no separate campaign required. The catch: you cannot yet specifically bid to appear there. Google decides placement.
2. ChatGPT Ads (OpenAI)
OpenAI launched its advertising pilot on February 9, 2026, for logged-in adult users on Free and Go plans. Paid subscribers on Plus, Pro, Business, Enterprise, and Education plans do not see ads. The ad unit sits below ChatGPT's responses, clearly labeled as "Sponsored," and includes a headline, short description, and optional image. As of April 2026, OpenAI quietly launched a self-serve ads manager for a subset of pilot advertisers — a three-tier structure (Campaigns, Ad Groups, Ads) that anyone who has used Google Ads or Meta Ads Manager will recognize immediately. The ChatGPT ads pilot hit $100 million in annualized revenue in under two months, at a reported $60 CPM.
3. Perplexity — Gone
Worth noting: Perplexity abandoned advertising entirely in February 2026 after testing sponsored follow-up questions through 2024–2025, citing user trust concerns. The company is now targeting $500 million in annualized subscription revenue as the ad-free alternative. One less platform to track, but it signals that not every AI search player will monetize through ads.
Skeptics are right to ask whether $5.1B → $100B in five years is realistic. WPP's own head of business intelligence, Kate Scott-Dawkins, acknowledged "generative search is a very difficult thing to forecast with zero historical data." But the structural case is strong for three reasons.
First, the budget transfer is already happening. WPP explicitly states that advertisers will transfer "traditional" search spending into generative AI ad options. This is not new dollars — it is existing search budgets moving platforms. That makes the growth curve more predictable than a brand-new category.
Second, the U.S. is the densest market. According to Campaign US's coverage, the U.S. dominates the generative search ad market, capturing roughly 60% of total revenue at approximately $3 billion in 2026 alone. Every service business competing for local customers in America is competing in the single most concentrated AI search advertising market on the planet.
Third, the growth-to-slowdown dynamic is real. Madison & Wall's parallel forecast projects overall search reaching $298 billion this year, with AI search the dominant growth driver. But overall ad market growth is forecast to slow from 10% in 2025 to 5% by 2028. That means AI search is taking share from other channels as macro growth decelerates — not just riding a rising tide.
The window analogy is early Google AdWords. Early Google advertisers famously generated extraordinary returns on ad spend that became impossible to replicate five years later as competition intensified. AI search ads are in the same early-low-competition moment today.
Service businesses — plumbers, dentists, HVAC companies, real estate agents, med spas, lawyers, financial advisors, contractors — have always been the core buyers of local search advertising. Google's Local Services Ads and pay-per-click campaigns are the lifeblood of lead generation for most of these categories. Here is what the AI search ad shift means in practical terms.
Discovery is moving upstream. When AI Overviews appear, organic click-through rates are dropping between 34% and 64%, according to AI Digital's 2026 Media Trends Report. Users are getting answers — including business recommendations — without ever clicking a blue link. If you are not appearing in the AI layer, you are not appearing at all for a growing share of high-intent queries.
Conversational intent is higher-quality. As one analyst noted, with a chat AI interface, users reveal preferences, constraints, and follow-up intent that they would never type into a search bar. A person asking ChatGPT "What's the best HVAC company near me for an emergency AC repair on a Saturday?" is not browsing. They are ready to book. That intent quality is why CPMs for ChatGPT ads are reportedly running at $60 — comparable to premium display, with search-quality intent.
Organic alone will not be enough. Google AI Mode already surpassed 1 billion monthly active users globally, and AI Overviews are now at 2.5 billion monthly active users. At that scale, paid placement inside AI results is becoming as essential as paid placement in traditional search results once was. The organic-only strategy that worked in 2020 is a partial strategy in 2026.
Budget reallocation is the core decision. WPP's Kate Scott-Dawkins noted that AI search growth is "potentially contributing to a deceleration within commerce" — meaning retail media networks are losing share to AI search. For service businesses, the equivalent is this: every dollar you leave in traditional Google text ads without monitoring whether those ads are also serving in AI Overviews is a dollar that may not be reaching the AI-first users who are increasingly where your customers live.
Here is what WPP's forecast cannot tell you, and what you should not pretend to know:
The right response to "early and messy" is not to wait. It is to start small, start now, and build measurement infrastructure so you have data when the market matures.
You do not need to overhaul your entire marketing strategy. You need to take three specific steps before your competitors do.
1. Verify your Google Ads campaigns are opted in to AI Overviews. Log into Google Ads and confirm your Search campaigns are not restricting ad formats in a way that excludes AI Overview placements. Check under "Campaign settings → Networks." If "Google Search Partners" and expanded display options are restricted, you may be opting out of AI placements without knowing it.
2. Run a test query for your highest-intent service keywords. Open Google in incognito mode and type your top 3–5 money keywords (e.g., "emergency HVAC repair [city]," "dental implants [city]," "real estate agent [city]"). Note whether an AI Overview appears. If it does, note whether your business or your competitor appears in it. This is your baseline. Do it again in 30 days.
3. Get on the waitlist for ChatGPT Ads. Go to openai.com and look for their business advertising or partner inquiry page. Even if you cannot access the self-serve manager yet, registering interest puts you in early cohorts. First-mover advantage in a $3 billion U.S. market is worth a 10-minute form fill.
4. Add a "sources" section to your service pages. AI systems cite pages that answer specific questions directly. Add an FAQ section with 4–6 question-and-answer pairs to each major service page (the same format as the section below). This is the single most cost-effective change you can make to improve AI citation eligibility without spending a dollar on ads.
5. Set a 90-day AI ad budget test. Even $500–$1,000 per month allocated to AI search experimentation — whether through Google AI Mode or the ChatGPT pilot when available — gives you real cost-per-lead data before the market gets competitive. Do not let perfect measurement be the enemy of early data.
---
What exactly are generative AI search ads?
Generative AI search ads are paid placements that appear inside AI-generated responses on platforms like Google AI Overviews, Google AI Mode, and ChatGPT. Unlike traditional search ads that appear as blue links, these placements are integrated into or displayed alongside conversational, AI-synthesized answers. WPP Media defines the category as advertising revenue generated through "AI-mediated discovery environments."
Do I need a separate budget for AI search ads, or do my existing Google Ads campaigns qualify?
For Google AI Overviews, your existing Google Search campaigns are automatically eligible for placement — no new campaign structure is required. Google determines which ads appear in AI-generated results based on your existing bids, quality scores, and ad relevance. For ChatGPT ads, you currently need to access OpenAI's self-serve pilot separately, as it operates on its own platform, though it mirrors the familiar Campaign / Ad Group / Ad structure of Google Ads.
How fast is this market really growing? Is the $100 billion projection reliable?
WPP Media projects generative search advertising will grow at nearly a 100% compound annual growth rate from 2026 to 2031, reaching $100 billion from $5.1 billion today. WPP's own analysts acknowledge this is difficult to forecast with no historical data, and one cited analyst cautioned that growth is not guaranteed once novelty fades. However, the structural case is strong: existing search budgets are already transferring into AI search, and the U.S. alone is projected to capture 60% of global AI search ad revenue.
Will AI ads replace my traditional Google PPC campaigns?
Not immediately, and probably not entirely. Traditional search and generative search are projected to account for 21.8% of total global advertising revenue combined in 2026, and both channels will coexist. The smarter framing is that AI ads are expanding the definition of "search advertising" rather than replacing it. For service businesses, the risk is not that Google Ads disappears — it is that organic and paid visibility in AI-generated answers becomes necessary in addition to, not instead of, traditional PPC.
What is the single most important thing a service business can do to show up in AI search results organically?
Structure your website's service pages to answer specific questions directly. Google states that to be eligible as a supporting link in AI Overviews or AI Mode, a page must be indexed and eligible to show with a snippet. Beyond that technical baseline, pages that answer clear questions in concise, well-structured prose — especially with FAQ sections — are consistently more likely to be cited in AI-generated answers. This applies to both Google AI features and ChatGPT, which also draws on indexed web content.
---
Sources: