Google Rewires Commerce, PMax Controls, and Publisher Economics Simultaneously
Executive Summary
Michaels' Ask Mike AI assistant is converting at 2x the rate of keyword search, Performance Max advertisers can now exclude brand-unsafe inventory networks for the first time since 2021, and Google's Buyer Direct routes display and OLV deals through GAM at zero intermediary cost. Three moves that together signal Google has concluded the keyword search funnel is terminal and is rebuilding demand capture infrastructure around what replaces it. Retail ecommerce leads in project-driven categories should pilot conversational commerce before October 2026.
The Signal
Michaels reported that its Google Gemini-powered AI shopping assistant 'Ask Mike,' launched July 21, doubles the conversion rate of traditional on-site search. The assistant handles open-ended project-based prompts — birthday party planning, craft ideas, DIY materials — collecting details on project type, colors, materials, and budget before surfacing relevant inventory. Separately, Google is beta-testing a Performance Max feature allowing advertisers to exclude the Google Search Partners Network and Google Display Network for the first time — inventory that media buyers have long flagged as brand-unsafe but were previously forced to accept. Google also debuted Buyer Direct at Cannes, currently in beta with Google Ad Manager publishers, enabling agency accounts to transact direct-sold display and online video deals without DSP or SSP fees.
What Changed
Retailers can now deploy conversational, project-intent AI assistants directly within commerce environments that measurably outperform keyword search on conversion — without requiring users to know what product they need. Simultaneously, Performance Max advertisers can, for the first time, exclude specific inventory networks, restoring brand safety controls that Google had withheld since PMax launched in 2021. These two shifts together mean AI-native commerce interfaces and cleaner programmatic execution are both operationally available now, not on a roadmap.
Why It Matters
The sharpest implication here is structural, not tactical: Google is simultaneously fixing its buy-side product (PMax exclusions), building a fee-free direct channel (Buyer Direct), and powering the retail AI interfaces that are replacing its own search entry point. These three moves are coherent only if you accept that Google has concluded the keyword search funnel is terminal and is pre-positioning for what replaces it. For retail marketers, the Michaels result resets the conversion benchmark. A 2x lift over keyword search is not incremental improvement — it is a different category of commerce interface, one where project-intent replaces product-intent and the basket size implications are structurally larger. Retailers with complex, multi-SKU, project-driven categories — home improvement, crafts, apparel, outdoor, kitchen — now have a deployable model that justifies rebuilding their onsite experience around conversational commerce. The cost of not moving is measurable and growing. For media buyers, the PMax exclusion capability makes billions in previously untouchable spend auditable for the first time. Budgets parked in Performance Max because brand safety controls were unavailable can now be repositioned with controls attached. That unlocks media spending that was frozen, not lost. Buyer Direct threatens the DSP and SSP fee layer on display and online video with a zero-marginal-cost alternative backed by 95% publisher penetration through Google Ad Manager. Independent agentic ad tech startups promising to automate direct deals are competing against an incumbent that already owns the pipes. The "why behind the why" is antitrust remediation accelerating Google's reinvention. Forced to unbundle AdX, Google is quietly rebuilding demand capture through GAM itself — a move that turns a compliance concession into a competitive moat.
Marketing Impact
media
PMax exclusions unlock the first genuine brand safety controls on a product that has absorbed enormous budgets since 2021. Media teams can now audit spend previously parked in GSP and GDN by default, attach exclusion controls, and reallocate to cleaner inventory — shifting from tolerance-based buying to standards-based buying.
ecommerce
Ask Mike's 2x conversion lift over keyword search resets the onsite commerce benchmark for project-driven retail categories. Ecommerce teams in multi-SKU verticals — crafts, home improvement, apparel, outdoor — now have a deployable conversational commerce model that expands basket size by replacing product-intent search with project-intent guidance.
marketing ops
Buyer Direct introduces a fee-free direct-deal channel for display and online video through Google Ad Manager, bypassing DSP and SSP margin layers. Ops teams managing programmatic stack costs gain a structurally cheaper execution path for direct-sold campaigns, but it also forces a review of which agentic ad tech investments remain defensible.
The Exploit
Opportunity
Retail marketers in multi-SKU, project-driven categories can deploy conversational AI commerce assistants — now proven at 2x conversion over keyword search — while simultaneously redirecting frozen PMax budget into auditable placements using exclusion controls. Both moves are operational today. The compound effect: higher onsite conversion and cleaner paid acquisition cost, captured before competitors reprice their models.
Risk
Conversational commerce introduces customer expectation risk: a poorly scoped assistant that surfaces irrelevant inventory or fails mid-project damages the session more than a failed keyword search. PMax exclusion changes delivery enough to break existing ROAS targets during the relearning period.
The Move
Retail ecommerce leads in project-category verticals should pilot a Gemini-powered conversational assistant against their highest-abandonment category pages before October 2026, using PMax exclusions to redirect brand-unsafe inventory savings into funding the build — with 90-day conversion rate delta as the sole success gate.
First-Mover Advantage
Gains
Retailers who deploy project-intent AI assistants before Q4 2026 holiday traffic set a new internal conversion benchmark and accumulate proprietary interaction data — project types, budget ranges, material preferences — that trains a progressively harder-to-replicate intent model.
Risks
Conversational commerce introduces customer expectation risk: a poorly scoped assistant that surfaces irrelevant inventory or fails mid-project damages the session more than a failed keyword search. PMax exclusion changes delivery enough to break existing ROAS targets during the relearning period.
Window
The window is approximately three to four quarters — until mid-2027 — when platform-native conversational tools standardise and the deployment advantage disappears. It closes the moment a major competitor publicly reports comparable conversion results.
Winners & Losers
Winners↑
Multi-SKU project-category retailers deploying conversational commerce
The Michaels result establishes a 2x conversion benchmark that resets what onsite search is worth in complex, project-driven categories — home improvement, crafts, apparel, outdoor, kitchen. The mechanism is a shift from product-intent to project-intent, which increases basket size structurally because the AI surfaces complementary SKUs a keyword search never would. Retailers in these categories should move immediately to evaluate Gemini-powered or equivalent conversational assistants as a primary commerce interface, not a feature addition.
Performance Max advertisers with previously frozen brand-safety budgets
The ability to exclude Google Search Partners Network and Google Display Network from PMax campaigns for the first time since 2021 unlocks media spend that was parked rather than invested — budgets held back because brand safety controls were unavailable, not because the channel lacked performance. The mechanism is straightforward: excluded inventory means auditable spend with controls attached. Media teams should immediately audit PMax allocations and redeploy previously excluded budget with exclusions now in place.
GAM-connected premium publishers transacting display and online video direct deals
Buyer Direct eliminates DSP and SSP fee drag on direct-sold display and online video campaigns for the 95% of publishers already operating inside Google Ad Manager. The mechanism is fee compression on a revenue line that publishers have historically had to share with intermediaries. Publishers should accelerate onboarding to the Buyer Direct beta and position their direct sales teams to transact through the GAM interface, where Google's incumbency advantage over any third-party agentic competitor is effectively insurmountable.
Retail media networks built on conversational and project-intent data
As AI shopping assistants like Ask Mike capture granular project-intent signals — budget, materials, colour, occasion — the underlying data asset becomes more valuable than the transaction itself for ad targeting. Retail media networks anchored to conversational commerce interfaces gain a qualitatively richer signal set than those relying on click-based search data. Networks in project-driven categories should instrument their conversational layers now to capture and activate this intent data before the window for first-mover measurement advantage closes.
Losers↓
DSP and SSP intermediaries dependent on display and online video fee revenue
Buyer Direct routes agency accounts directly to publisher inventory through Google Ad Manager at zero marginal cost to buyers, bypassing the DSP and SSP fee layer entirely for display and online video — the exact inventory classes where Google just lost its antitrust monopoly ruling. The mechanism is incumbency inversion: Google turns a compliance concession into a structural moat by making GAM itself the liquidity source. DSPs and SSPs in these channels must accelerate differentiation into channels and formats where Google's ad server consolidation does not extend — CTV, audio, retail media — or face permanent fee compression.
Agentic direct-sales ad tech startups building on top of fragmented publisher infrastructure
Buyer Direct solves the exact problem agentic direct-sales tools were designed to address — fragmented inventory, inconsistent publisher APIs, manual reconciliation — but solves it from inside the system rather than around it. With 95% publisher penetration through GAM, Google offers a single integration point that no external agentic layer can replicate without replicating Google's infrastructure. Startups in this category need to reframe their value proposition away from display and online video and toward channels — podcast, DOOH, CTV, endemic retail media — where no single ad server holds equivalent consolidation.
Keyword-dependent onsite search vendors serving multi-SKU retail categories
A verified 2x conversion lift for conversational AI over traditional keyword search in a major retail deployment makes the incumbent onsite search model quantifiably inferior, not just directionally challenged. The mechanism is product-intent replacement: shoppers who arrive with project-level prompts are underserved by keyword matching and overserved by conversational AI that sequences qualification questions before surfacing inventory. Vendors in this space face accelerating displacement as retailers in project-driven categories benchmark against the Michaels result and reprioritize onsite search budgets toward conversational commerce infrastructure.
Strategic Outlook
Retailer adoption of conversational commerce will accelerate sharply once Ask Mike's conversion data circulates through the category. Expect Home Depot, Joann, and comparable multi-SKU retailers to announce Gemini-powered assistants before Q2 2027 — the benchmark is now public and the build-versus-buy calculus favours Google's existing stack. On the media side, PMax exclusion controls will trigger a wave of retroactive spend audits in Q4 2026 as agencies revisit placements their clients tolerated for years. Buyer Direct's trajectory depends entirely on how aggressively Google deploys it post-AdX remediation; if the antitrust consent decree forces AdX divestiture, Google has already demonstrated GAM can anchor a replacement demand channel. Independent DSPs and SSPs serving the display and OLV market face structural compression from both directions — fee pressure from Buyer Direct below and agentic direct-deal automation above — with Google holding the incumbent position in both.
Sources
AdExchanger
Maximum Performance, Minimum Effort; A Fix For Overfrequency?
AdExchanger
Google’s Buyer Direct Could Beat Agentic Ad Tech At Its Own Game
Digiday
Michaels claims Google-powered AI assistant doubles conversion rate of traditional search
Medium AI Tag
For the First Time Ever, Google’s AI Bet Is Costing More Than It Makes