There is a particular kind of Google Ads surprise that can ruin an otherwise decent Tuesday: an alert that says a campaign has been “upgraded,” followed by a bill that is strangely energetic.

This month, plenty of advertisers have reason to look twice. Google began automatically moving eligible Search campaigns into AI Max in September. If your campaigns use automatically created assets or a campaign-level broad match setting, they may already have made the trip. Dynamic Search Ads have a longer runway, with the broader sunset and automatic upgrade beginning in February 2027, but their direction of travel is exactly the same.

Google positions AI Max as a smarter layer for ordinary Search campaigns, rather than a whole new campaign type. That distinction matters. It can expand the searches you reach, tailor text to the query and send a customer to a different page on your site when Google thinks that page has a better chance of converting.

Useful? Potentially. A setting you should leave unchecked because it has the word AI in it? Not necessarily. But this is not a set-and-forget update either. It puts more of your website, your data and your decisions into the hands of the system. Before you let it spend freely, give it some adult supervision.

First, find out whether anything has changed

Start with the unglamorous bit: log into Google Ads and look for the upgrade notification, then check campaign settings for AI Max. Do not rely on a vague recollection that you “never turned that on.” Automatically created assets and campaign-level broad match were both eligible for the September upgrade, and Google says it notified accounts before the transition.

Then compare the last few weeks with the period before the change. Look at spend, conversions, cost per conversion, conversion value, click-through rate and, crucially, search terms. Do this by campaign, not just at account level. One profitable brand campaign can make an untidy non-brand campaign look fine when you blend the two together.

Google has added AI Max match-type and source information to its reporting, along with headlines and URLs in the search terms report. That is helpful. Use it. You want to know whether extra traffic is coming from broad-match expansion or keywordless matching, what Google said to win the click, and where it landed the visitor.

It sounds fussy. It is also the difference between treating your ad account like a business tool and treating it like a slot machine with better typography.

Your conversion tracking is now the steering wheel

Automation learns from the outcomes you feed it. If your primary conversion is “anyone who submitted a form,” AI Max will hunt for people likely to submit forms. It cannot tell the difference between your ideal client and somebody wanting a quote for a service you do not offer unless your measurement helps it.

Before you judge performance, check the conversion actions that inform bidding. Are duplicate leads being counted? Does a contact-form completion fire even when the form fails? Are you recording booked jobs, qualified consultations or actual revenue as a downstream conversion? Are phone calls being attributed sensibly?

For a local service business, a better setup might distinguish a general enquiry from a qualified booking. For an online retailer, it means checking that purchase value, refunds and product-level reporting have not quietly gone sideways. For a B2B business, it usually means getting sales and marketing to agree on what counts as a real lead before asking a machine to find more of them.

You do not need immaculate enterprise analytics to run a small campaign. But you do need a conversion signal you would be happy to get more of. Otherwise, the system will pursue volume with the confidence of a puppy in a snack aisle.

Read the search terms, even if Google promises relevance

AI Max search term matching can use your existing keywords, ad copy and URLs alongside broad-match and keywordless technology to find related queries. That may uncover demand you would never have built a keyword list for. It may also surface a looser interpretation of “related” than you had in mind.

Pull the search terms report weekly while you are learning how the campaign behaves. Look for the obvious irrelevancies, of course, but also for more subtle mismatches: people seeking a cheap DIY version of a premium service; job seekers clicking a hiring-related phrase; customers from a location you cannot serve; bargain hunters entering a high-consideration sales process.

Turn recurring mismatches into negative keywords. Check your location settings too. A business that serves Brisbane does not necessarily want clicks from people merely showing interest in Brisbane while sitting in Perth. AI Max now offers locations-of-interest controls at the ad-group level, which gives you more ways to draw a sensible geographic boundary.

The goal is not to strangulate every new query. It is to discover what “more reach” actually means for your business before you congratulate it for bringing more traffic.

Check what Google is saying, and where it sends people

Two AI Max features deserve a very close look: text customization and Final URL expansion.

Text customization can draw on your existing ads, landing-page copy and assets to create more query-specific ad text. Final URL expansion can send a user to another relevant page on your domain, rather than the exact final URL you selected. Google says these tools help it make creative and landing pages more relevant.

That is lovely when your site is current, clear and well organised. It is more complicated when you have old sale pages, retired services, a weak FAQ from 2022 or six blog posts that all say nearly the same thing.

Review the pages that AI Max has chosen and the headlines it generated. Exclude any URL that should never be a paid landing page. Check seasonal pages, customer logins, outdated price pages and content that is useful for organic search but unsuitable as a sales destination. If you use tracking templates, test dynamic URLs as well; Google specifically warns that incompatible templates can cause landing-page errors.

Also read generated copy as a customer would. Does it make a claim you cannot support? Does it use a tone that feels unlike you? Does it accidentally imply a price, promotion or service area you do not offer? You are still responsible for the ad, even if a machine wrote the first draft.

Give it clear boundaries, not a blindfold

AI Max is not a case for abandoning control. Google includes brand inclusions and exclusions, URL exclusions and text guidelines. Its newer AI Brief feature is designed to let advertisers spell out messaging, matching and audience guidance in plain language.

Use those controls with intent. Write down the brands you do not want to appear next to. Define the services or categories you should not match. Add the phrases your ads must avoid. If you sell a premium product, do not make the system guess whether you are willing to compete for “cheap” searches. If you are a specialist, explain the specialism.

The better your instructions and source material, the more likely the automation is to behave like a capable assistant rather than an enthusiastic intern who has been told to “find opportunities.”

Run a real test before making a grand judgement

Google recommends one-click experiments to assess AI Max. That is good advice. Rather than flipping every campaign at once, test it against a comparable control where possible. Give the experiment enough time to collect meaningful data, but set your own guardrails: a spending limit, a review date and the outcome that would make you pause it.

Measure qualified leads, sales and profit, not only platform-reported conversions. Google says advertisers using the full AI Max feature suite have seen an average 7% lift in conversions or conversion value at a similar CPA or ROAS compared with search-term matching alone. That is an aggregate, internal Google figure for non-retail advertisers, not a promise for your account.

Your account has your margins, your sales cycle and your customers. It gets the deciding vote.

AI Max can be a useful way to find demand beyond the tidy keyword list you built three years ago. But it rewards businesses that know what a good customer looks like, have clean information on their site and are willing to check the work.

That is still marketing, by the way. It just happens to come with more settings now.

Sources: Google’s AI Max upgrade announcement and Google Ads Help: how AI Max works.