---
title: "Google's AI campaign stack: Performance Max, Demand Gen…"
description: "Three campaign types, three jobs Google Ads now offers three AI-first campaign types that most advertisers combine: Campaign Primary job Inventory Main…"
url: https://optimizeall.com/learn/ai-performance-marketing/google-ai-campaign-stack
updated: 2026-10-05
---

AI-Powered Performance Marketing · How ad platform AI works now · lesson 2 of 15 · 9 min

# Google's AI campaign stack: Performance Max, Demand Gen and AI Max for Search

## Three campaign types, three jobs

Google Ads now offers three AI-first campaign types that most advertisers combine:

| Campaign | Primary job | Inventory | Main inputs |
|---|---|---|---|
| **AI Max for Search** (a setting on Search campaigns) | Capture intent from searches, including queries your keywords miss | Google Search and search partners (per settings) | Keywords, landing pages, text assets, brand controls |
| **Performance Max** | Cross-channel conversion goal with one budget | Search, Shopping, YouTube, Display, Discover, Gmail, Maps | Asset groups, product feed, audience signals, search themes |
| **Demand Gen** | Create and shape demand with visual formats | YouTube (including Shorts), Discover, Gmail, and display inventory | Image and video creative, audiences, lookalike segments |

Google has also been moving older formats into these: Dynamic Search Ads are being upgraded to AI Max, Video Action campaigns moved to Demand Gen, and display inventory now has a home in Demand Gen. Check the Google Ads announcements page for the current migration timelines in your account.

## AI Max for Search: what it adds

AI Max is a one-click suite on a standard Search campaign. It has three main parts:

- **Search term matching** — uses your keywords, ads and landing pages to match relevant queries beyond your keyword list (broad match plus "keywordless" matching).
- **Text customization** (formerly automatically created assets) — generates headlines and descriptions from your landing pages and assets.
- **Final URL expansion** — sends the click to a more relevant page on your site than the final URL you set.

Controls you keep: brand inclusions and exclusions, locations of interest, URL exclusions, negative keywords, and the option to switch off text customization or URL expansion individually. AI Max reports show which queries and landing pages came from the expansion, so you can see what the AI added.

**When to use it:** accounts with solid conversion tracking and landing pages that genuinely answer many queries. **When to wait:** tiny budgets, poor tracking, or regulated industries where every headline must be pre-approved (in which case disable text customization).

## Performance Max: one budget, many channels

Performance Max (PMax) optimizes toward your conversion goals across all Google inventory. Your levers:

- **Asset groups** — organize by theme or product line, each with its own headlines, descriptions, images, videos and audience signals.
- **Product feed** (for retail) via Merchant Center — titles, images and attributes drive Shopping placements.
- **Search themes** — tell the system which topics are relevant.
- **Controls** — account-level and campaign-level negative keywords (applying to Search and Shopping inventory), brand exclusions, URL expansion settings, customer acquisition goals.
- **Reporting** — channel performance reporting, search terms reporting and asset reporting have been rolled out; use them to verify where money goes.

A common, costly mistake is letting PMax cannibalize brand search. Apply brand exclusions or run a separate brand Search campaign and review search terms weekly.

## Demand Gen: visual, mid-funnel

Demand Gen is built for scroll and watch environments. It supports video, image and carousel formats, product feeds, and lookalike segments built from your customer lists. It is where you test creative angles that introduce a product to people who are not yet searching. Google has been shipping regular "Demand Gen Drops" with new features — for example, creative insights and more aspect-ratio options. Treat these as options to evaluate, not defaults to enable.

## Worked example: a Dubai home-services company

A Dubai-based AC maintenance company spends a monthly budget on Google. Illustrative plan:

- **Search + AI Max** for high-intent service queries ("AC repair Jumeirah"), brand excluded, service-area locations only, URL exclusions for the careers page.
- **PMax** focused on lead form conversions with offline conversion import from the CRM so the model learns which leads became paying jobs.
- **Demand Gen** with short vertical videos ahead of summer, to build demand before peak season.

Budget split starts roughly 60/30/10 (illustrative) and is revisited using incrementality tests later in the course.

## Hands-on: a weekly Google AI campaign review

```text
Weekly review checklist (30 minutes)
1. Search terms (Search + AI Max + PMax): add negatives for irrelevant or brand-harvesting queries.
2. AI Max landing pages report: exclude URLs that should never receive ad traffic.
3. PMax channel performance: note any channel taking budget with no conversions.
4. Asset reporting: replace the bottom performers; add one new concept per asset group.
5. Conversion health: Diagnostics page — tag firing, enhanced conversions status, offline import errors.
6. Budget pacing vs plan; note any "limited by budget" campaigns with strong marginal returns.
```

Use a Google Ads script or the Google Ads API to export search terms weekly into a sheet and let an LLM cluster them into "relevant / irrelevant / brand" for a human to approve — never auto-apply negatives without review.

## Pitfalls

- Turning on everything at once, so you cannot tell what helped.
- Weak landing pages: AI Max and URL expansion use your site's content, so thin pages produce weak matches.
- Optimizing for all conversion actions, including low-value ones like page views.

## Video lecture: Google's AI campaign stack: Performance Max, Demand Gen and AI Max for Search

Lecture coming soon · 13 chapters · about 9 minutes. Read the full transcript below.

1. Google's AI campaign stack
2. Why it matters
3. AI Max for Search
4. When to use AI Max
5. Performance Max
6. Simple example: Manchester bookstore (illustrative)
7. Demand Gen
8. Example: Dubai AC services (illustrative)
9. Sequence your changes
10. Weekly 30-minute review
11. Mistakes + try this now
12. Watch me do it: weekly review (illustrative)
13. Recap and next step

## Lecture transcript

### Google's AI campaign stack

Google now gives you three AI-first campaign types, and most advertisers get into trouble by using all three without knowing what each one is for. In this lecture you'll learn the job of AI Max for Search, Performance Max and Demand Gen, which controls you still keep in each, and a thirty-minute weekly review that keeps the machine honest.

### Why it matters

Why does this matter? Because these three campaign types overlap, and when they overlap badly, they compete for the same customer and you pay twice for the same demand. Here's an analogy. Think of a shop with three staff. One stands at the door greeting people who already know what they want. That's Search with AI Max. One works every aisle and the stockroom. That's Performance Max. And one is out on the street handing out samples to people who've never heard of you. That's Demand Gen. If all three crowd the door, the street never gets worked and the door gets expensive. Your job is giving each one a clear station.

### AI Max for Search

Start with AI Max for Search. It isn't a separate campaign type. It's a suite you switch on inside a normal Search campaign. It has three parts. Search term matching finds relevant queries beyond your keyword list. Text customization writes headlines and descriptions from your landing pages. And final URL expansion can send a click to a more relevant page on your site. You can switch the last two off individually, and you keep brand controls, URL exclusions and negative keywords.

### When to use AI Max

When should you use AI Max? When your conversion tracking is solid and your landing pages genuinely answer lots of questions. The system reads your site to decide what you're relevant for, so thin pages make weak matches. When should you hold back? On tiny budgets, with broken tracking, or in regulated industries where every headline needs sign-off. In that last case, keep search term matching but switch off text customization, so only approved copy runs.

### Performance Max

Next, Performance Max. One budget, every Google channel: Search, Shopping, YouTube, Display, Discover, Gmail and Maps. You steer it with asset groups, a product feed if you sell products, audience signals, and search themes. For years the complaint was that it was a black box. Google has since rolled out channel performance reporting, search terms reporting, and campaign-level negative keywords. Use them. The classic PMax trap is quietly harvesting your own brand searches, so apply brand exclusions and check search terms every week.

### Simple example: Manchester bookstore (illustrative)

Let's walk a simple example. A small online bookstore in Manchester sells children's books. They have one Search campaign on exact match keywords like children's books online. They switch on AI Max search term matching and, in the first two weeks, the search terms report shows new queries like bedtime stories for five year olds and gift books for toddlers, which convert well. But it also shows free printable colouring pages, which never convert. So they add free and printable as negative keywords and keep the good expansion. That's the pattern you'll repeat forever: let the AI explore, read the report, fence off the junk, and keep the wins.

### Demand Gen

Third, Demand Gen. This is Google's visual, mid-funnel campaign, running on YouTube including Shorts, Discover, Gmail and display inventory. It's where you introduce your product to people who aren't searching yet. Think short vertical videos, product carousels, and lookalike segments built from your customer lists. Google ships regular feature drops for Demand Gen, so treat each new feature as something to test, not a default to enable. Google has also moved older formats, like Video Action campaigns, into Demand Gen.

### Example: Dubai AC services (illustrative)

Let's put it together with an example. A Dubai air-conditioning maintenance company. AI Max on Search for high-intent queries like AC repair in a specific neighborhood, with their brand excluded and the careers page blocked as a landing page. Performance Max optimizing for leads, fed with offline conversion imports from the CRM, so the model learns which leads actually became paid jobs. And Demand Gen running short vertical videos in the weeks before summer, to build demand before peak season.

### Sequence your changes

One more thing about sequencing. Don't switch on every AI feature on the same day. If you enable AI Max, launch Performance Max and start Demand Gen in one week, and results change, you'll have no idea why. Roll out one change at a time, give it enough conversions to learn, and where you can, use Google's built-in experiments to split traffic between the old and new setup. It feels slower, but it's the only way to know what actually helped, and it gives you evidence when a client or a boss asks why you changed things.

### Weekly 30-minute review

Now the habit that separates pros from button-pushers: a thirty-minute weekly review. One, search terms across Search, AI Max and PMax, adding negatives for junk and brand leakage. Two, the AI Max landing pages report, excluding pages that should never get ads. Three, PMax channel performance. Four, asset reports, replacing the weakest and adding one new concept. Five, conversion diagnostics. Six, budget pacing. You can use an LLM to cluster search terms, but a human approves every negative.

### Mistakes + try this now

Here are the mistakes to avoid with Google's AI campaigns. Running Performance Max and a brand Search campaign without brand exclusions, so they fight over your own name. Feeding Performance Max a poor product feed with vague titles, then blaming the algorithm. Counting page views or scroll events as primary conversions, so bidding optimizes for the wrong thing. And never opening the channel performance report. Try this now: open your Google Ads conversions page and list which actions are marked primary. If anything other than real business outcomes is primary, change it to secondary before you touch any campaign setting.

### Watch me do it: weekly review (illustrative)

Watch me do it. Let's run the weekly review on an illustrative Karachi solar installer's account. First, search terms. I filter the last seven days across Search and Performance Max. I see solar panel price in Karachi, great, solar panel installation jobs, not a customer, so I add jobs as a negative, and the brand name appearing inside PMax, so I check brand exclusions are on. Second, the AI Max landing pages report. One click went to the blog post about net metering rules. It converts badly, so I add it as a URL exclusion. Third, PMax channel performance. Display is taking a slice of spend with no leads, so I look at which assets serve there and plan a stronger image set rather than panicking. Fourth, assets. One headline, cheapest solar in Pakistan, is a claim we can't prove, so I remove it. Fifth, diagnostics: enhanced conversions active, offline import of site-survey bookings succeeded. Sixth, pacing: the Search campaign is limited by budget with a healthy cost per lead, so I propose a small increase. Thirty minutes, six decisions, each backed by a report.

### Recap and next step

To recap: AI Max captures intent beyond your keywords, Performance Max spends one budget across every channel, and Demand Gen creates demand with visual formats. Each has controls you must use deliberately. Your next step: export last month's search terms from one campaign, sort them into relevant, irrelevant and brand, and decide whether you need brand exclusions. It's the fastest audit in paid search, and it almost always finds money.

## Key takeaways

- AI Max upgrades Search campaigns with search term matching, text customization and final URL expansion — each can be controlled.
- Performance Max spans all Google inventory; use brand exclusions, negatives and channel/search-term reports to keep it honest.
- Demand Gen is for visual, mid-funnel demand creation on YouTube, Discover and Gmail.
- Legacy formats (DSA, Video Action) are migrating into these campaign types; check current timelines.
- Review search terms, landing pages, channels and assets weekly.

## Try it

Export last month's search terms from one Search or PMax campaign. Classify them into relevant, irrelevant and brand. Draft a negative keyword list and a note on whether brand exclusions are needed.

- [Previous: How ad platform AI actually works in 2026](https://optimizeall.com/learn/ai-performance-marketing/how-ad-platform-ai-works-now)
- [Next: Meta Advantage+, TikTok Smart+ and LinkedIn's AI campaigns](https://optimizeall.com/learn/ai-performance-marketing/meta-tiktok-linkedin-automation)
- [All lessons of AI-Powered Performance Marketing](https://optimizeall.com/learn/ai-performance-marketing)