Microsoft Advertising just handed performance marketers more control over automated campaigns. In its October 2026 rollup, the platform introduced a 40-guideline system for AI-generated ad copy, made its Conversions API generally available, and opened up more reporting for Performance Max.
40 written guardrails for AI copy
Advertisers can now give Microsoft’s AI up to 40 written instructions on what generated ad copy should and should not say. The feature is in open pilot for Performance Max campaigns and Search campaigns with AI Max turned on.
Microsoft wants these used as broader brand rules: claims to avoid, themes to steer around, tone of voice, and language that should never appear. Its own example is a high-end retailer writing “Never imply that products are low cost.”
Unlike a simple blacklist, the tool also accepts preferred wording, themes, and tone. That makes it closer to a creative brief than a restriction list. The 40-guideline cap matches Google’s text-guideline feature, though Microsoft’s version is notable for accepting positive guidance in addition to rules about what not to say.
But guardrails are not guarantees. Microsoft says the feature reduces risk and review time, not that generated copy will always obey every instruction. A human review pass still matters.
More visibility inside Performance Max
The copy controls arrive alongside transparency updates that paid search teams have been requesting:
- Search term reporting is live for Performance Max, showing which queries triggered your ads.
- Auction insights are live, so you can see how you compare with competitors.
- Search-term-to-landing-page reporting begins rolling out mid-November.
- Age and gender targeting is generally available; device targeting is expected “in the coming weeks.”
Audience exclusions and messaging guidelines are pilots, so you’ll likely need to ask your account team for access. Microsoft is also refining brand exclusions so you can keep text ads off certain brand queries while product ads still show.
Conversions API leaves pilot
Microsoft’s Conversions API is now generally available. It sends conversion events from your website, app, CRM, or point-of-sale systems to Microsoft through a server-to-server connection.
This matters because browser-side tags can hit limits. Microsoft positions the API as a complement to Universal Event Tracking, not a replacement. Setup routes include direct integration, Google Tag Manager, and partners such as Segment by Twilio, Tealium, and Adobe Real-Time CDP.
What to do this week
Request access to the messaging guidelines pilot if you run PMax or AI Max. Draft guardrails as brand rules, not ad-level edits: banned claims, tone, and wording to avoid, plus phrases you prefer.
Connect Conversions API if browser tags are your only signal. Run it alongside UET and keep deduplication clean so a purchase isn’t counted twice.
Then pull the new search term and auction insights reports before you adjust budgets. The whole point is to steer AI with evidence, not with guesswork.
Source: PPC Land
