AI in Google Ads: What to Let It Control

Almost every Google Ads account in Malaysia now runs on some form of automation. Smart Bidding sets the bids. Broad match and AI Max decide which searches trigger your ads. Performance Max chooses the channel. The real question is no longer “should we use AI?” It is which decisions you hand over, and which ones you keep.

Get that split wrong in one direction and you pay for manual work that a machine does better. Get it wrong in the other and the machine optimises hard towards the wrong goal, with your money.

This guide from IZI Digital Marketing gives you a practical control map: what AI in Google Ads handles well, where it needs guardrails, and what should stay with a person. It supports our guide to choosing an SEM agency in Malaysia, because how an agency divides work between people and automation says a lot about its judgement. Google’s own short video below introduces AI Max, the newest layer of automation in Search.

PART 1 · DIAGNOSE

How Is AI Used in Google Ads Today?

IN BRIEFAI in Google Ads now works in six places: bidding, search term matching, ad copy, landing page choice, channel allocation and audience expansion. Each is a separate switch with its own controls. The bidding layer is the oldest and most mature, as our comparison of Smart Bidding strategies for Malaysia shows.

Many owners picture “Google AI” as one big dial. It is really a set of separate systems, and you can turn most of them on or off one at a time:

• Bidding: Smart Bidding sets a bid for every auction based on the chance of a conversion, using signals such as device, location and time.
• Search term matching: broad match and AI Max’s keywordless matching decide which searches your ads enter, beyond the exact words you listed.
• Ad copy: responsive search ads mix your headlines, and AI Max’s text customisation can write new ones from your site.
• Landing pages: final URL expansion can send a click to a different page on your domain than the one you set.
• Channels: Performance Max spreads one budget across Search, YouTube, Display, Discover, Gmail and Maps.
• Audiences: optimised targeting and Lookalike segments widen reach past the lists you gave it.

Google describes AI Max for Search campaigns as an optimisation layer inside ordinary Search campaigns, not a new campaign type. That design matters for control. Search term matching can be switched off per ad group, while text customisation and URL expansion are separate campaign-level settings.

Timing matters too. Google’s Ads blog confirms that from September 2026, campaigns using automatically created assets or the campaign-level broad match setting are being upgraded to AI Max, while Dynamic Search Ads follow from February 2027. Some of these switches may flip in your account without a meeting. Check which settings are now on.

BENCHMARK BRIEFING 1 OF 4

What Can You Still Control When AI Runs Your Ads?

IN BRIEFEvery AI layer in Google Ads comes with at least one control you keep: negative keywords, brand exclusions, URL exclusions, locations of interest, asset removal or budget caps. Guardrails, not switches, are where the skill now sits. Our negative keywords guide covers the most-used one.

Look at the last row. The conversion goal is the one lever AI never touches. If you count a phone-number click the same as a signed contract, the system will find you more phone-number clicks. Every other control on the map only limits damage. This one decides direction.

PART 2 · DIAGNOSE

Is Your Account Ready for More Google Ads Automation?

IN BRIEFAn account is ready for more automation when it tracks real business outcomes, records conversions every week, and is not held back by budget. Missing any of these, AI learns slowly or learns the wrong thing. Start with our guide to Google Ads conversion tracking with GA4.

Most articles on AI in Google Ads ask whether the tools work. They usually do. The better question is whether your account can feed them. Four checks tell you:

1. Conversions reflect money: your primary conversion is a qualified lead, booking or sale, not a page view or a duplicate form fire.
2. Volume is steady: conversions arrive every week, not in a burst once a month, so the system has a signal to learn from.
3. Budget is not the limit: Google’s own help page notes that AI Max won’t be effective if campaigns are limited by budget. Expansion needs room to spend.
4. The site can take the traffic: AI may send people to pages you never used for ads. Those pages need clear offers and working forms.

BENCHMARK BRIEFING 2 OF 4

How Many Conversions Does Google Ads AI Need?

IN BRIEFIn our planning model, an account under 15 conversions a month should delegate only one or two levers. Around 30 a month, target-based bidding and a controlled AI Max test become sensible. At 50 or more, most levers can be handed over with guardrails. How that fits your Google Ads account structure matters too.

The ladder never reaches six. That is deliberate. Even the biggest accounts using AI in Google Ads should keep the conversion goal in human hands, because only the business knows which enquiries turned into paying customers.

PART 3 · DESIGN

Should You Let Google AI Control Bids, Keywords and Ads?

IN BRIEFHand bids to AI first; it beats manual bidding once conversions are steady. Give AI search matching and copy only with negatives and brand controls set. Keep conversion definitions, budget and brand positioning yourself. Our explainer on Google Ads keyword match types covers the matching side.

Each lever of AI in Google Ads carries a different risk. Bids adjust in small steps and correct themselves. Matching and landing pages can go wrong in bigger jumps, such as an ad for “aircond servicing” showing on “aircond technician job” searches, or a click landing on your careers page.

Performance Max sits across all of these at once, which is why it suits stores with a strong product feed more than service firms with thin data. Our Performance Max guide explains when that trade-off pays. For visual prospecting, Demand Gen ads give you more say over audience and channel than Performance Max does.

BENCHMARK BRIEFING 3 OF 4

Does AI Max Improve Google Ads Results?

IN BRIEFGoogle reports that advertisers who switch on AI Max typically see 14% more conversions at a similar CPA. In our eight-week model, a Search campaign dips in weeks three and four, then ends 15% ahead, as weekly negative-keyword work cuts irrelevant spend. The gain depends on that review, which a proper Google Ads management routine includes.

Watch the last column, not just the first. The spike in irrelevant spend in week three is normal: AI Max is exploring new searches. It only falls because someone reads the search terms report each week and adds negatives. Skip that routine and week three’s waste becomes the permanent level.

PART 4 · DEPLOY

How to Test AI Features in Google Ads Safely

IN BRIEFTest one AI feature at a time, in one campaign, against a clear baseline. Set guardrails before switching it on, review search terms weekly and judge results after at least six weeks. The same patience applies when you decide whether to bid on your own brand name.

A clean test of AI in Google Ads protects both your budget and your ability to learn from it. Change one thing, then wait.

1. Record a two-week baseline: note conversions, CPA and search term quality before you change anything.
2. Clean the conversion goal: set only real business outcomes as primary conversions, and remove duplicate or soft actions.
3. Set guardrails first: add negatives, brand exclusions for competitor or your own brand terms as needed, and URL exclusions for pages that should never receive ad traffic.
4. Switch on one feature in one campaign: AI Max, broad match or text customisation, not all three at once.
5. Review weekly: read the search terms report, remove weak generated assets and add negatives.
6. Judge at week six to eight: compare against baseline on CPA and conversion quality, then keep, adjust or switch off.

Step two is where most tests are lost before they start. A clean landing page for Google Ads helps too, because AI-matched traffic is broader and needs a page that qualifies it quickly.

BENCHMARK BRIEFING 4 OF 4

Where Does Google Ads AI Waste Budget Without Guardrails?

IN BRIEFIn our model of a RM10,000-a-month AI-heavy account, missing guardrails leak about RM3,500 a month across four areas. With guardrails set, the leak drops to about RM850. The biggest single fix is conversion hygiene, which an audit of your Google Ads agency’s work should check first.

None of these leaks mean AI in Google Ads is “failing”. Each one is the system following an instruction nobody checked. That is why the guardrails matter more than the switch, and why they belong in any agency’s monthly report.

PART 5 · DRIVE

What to Ask Your Agency About AI in Google Ads

IN BRIEFAsk which AI features are on, why, and which guardrails sit around each one. A good agency answers with specifics and a review routine. Build these questions into your digital marketing RFP so every agency answers them the same way.

• “Which AI features are switched on, and who chose them?” Defaults accepted without a reason are a warning sign.
• “What is our primary conversion, and how was it checked?” The answer should connect to real enquiries or sales, not form fires.
• “How often do you read the search terms report?” Weekly is the healthy answer when broad match or AI Max is on.
• “Which URLs and brands have you excluded?” A blank answer means landing pages and brand queries are unguarded.
• “What would make you switch a feature off?” An agency with a clear stop rule is testing. One without is hoping.

These questions separate an agency that manages AI from one that simply accepts Google’s recommendations. That judgement is the core of what a good SEM agency Malaysia businesses can trust brings to the account.

THE DECISION

So, What Should AI Control in Your Google Ads?

Let AI in Google Ads control bids as soon as your conversion tracking is clean. Give it search matching, ad copy and landing pages step by step, each with guardrails and a weekly review. Keep the conversion goal, the budget and your brand boundaries yourself. Handled that way, automation does the work it is best at, and you keep the decisions only your business can make.

FAQ

Frequently Asked Questions

1. How is AI used in Google Ads?

AI sets bids, matches ads to searches, writes and mixes ad copy, picks landing pages and splits budget across channels. Which ones run depends on your settings; most can be switched on or off separately, and each comes with its own controls.

2. What is AI Max in Google Ads?

AI Max is an optimisation layer for Search campaigns, not a new campaign type. It depends on automated bidding to work fully; it adds search term matching, text customisation and final URL expansion, plus brand and location controls.

3. Should I let Google AI control my keywords?

Yes, once your conversions are clean and steady. It depends on your guardrails, though; broad match or AI Max needs negative keywords, brand controls and a weekly search terms review, or irrelevant spend creeps up.

4. Can AI in Google Ads waste my budget?

It can, when it follows a poor instruction. It depends mostly on your conversion goal; if soft actions count as conversions, the system chases them. Clean goals and guardrails remove most of the waste.

5. Is AI in Google Ads worth it for small businesses?

Partly. It depends on conversion volume; a small account with few conversions should automate bidding first and keep keywords tight, then add AI Max once conversions arrive steadily every week.