Search Engine Land reported on 27 July 2026 that Microsoft Advertising has extended its Ad Preview Hub to Performance Max campaigns. The tool was previously available for Audience ads. Advertisers open an asset group, select "Preview ads", and see eligible ad formats rendered across devices and placements before the campaign goes live. The hub also generates a secure shareable link, so clients and stakeholders can review creative without access to the Microsoft Advertising account. This is Microsoft Advertising's Performance Max, not Google's campaign type of the same name.
What the Ad Preview Hub does inside Performance Max
According to Search Engine Land, the workflow starts inside an asset group. Choosing "Preview ads" renders the formats the asset group is eligible to serve, shown across devices and placements. The point is to see the assembled ad before spend starts, rather than after a report tells you something looked wrong.
Microsoft had already shipped the Ad Preview Hub for Audience ads. Extending it to Performance Max is the part that matters, because Performance Max is the campaign type where the advertiser hands the most assembly work to the platform.
The shareable link is the real change
The hub generates a secure shareable link for each preview. Microsoft states that only the person who generates the link and those they share it with can access the preview. That removes the step everyone quietly hated: provisioning account access for a reviewer who only needs to look at one thing once.
Search Engine Land frames the feature as reducing reliance on screenshots and third-party approval tools for creative sign-off in AI-assembled campaigns. That framing is fair. Screenshot-based approval loses the rendering, loses the placement context, and ages badly the moment an asset changes.
Microsoft Performance Max is not Google Performance Max
Both Microsoft Advertising and Google Ads sell a campaign type called Performance Max. This news concerns the Microsoft one only. If you run both, do not assume a feature in one platform exists in the other, and check where a preview link came from before you send it to a client. Anyone managing cross-platform paid search alongside Google Ads work will recognise how easily the two names get conflated in a status update.
A note on sourcing
This report comes from Search Engine Land. No first-party Microsoft Advertising blog post covering the change turned up, and their blog's most recent listed post at the time of writing was dated 22 July 2026. Treat the details above as reported by Search Engine Land rather than as text lifted from an official announcement page.
Why creative approval is the weak point in automated campaigns
Automated campaign types put assets in and get ads out, with the platform deciding the combination. The advertiser approves inputs, not outputs. That gap is where approval anxiety lives, and it is why account managers end up pasting screenshots into chat threads to prove what an ad looks like.
A preview that renders eligible formats before launch closes part of that gap. It does not make the automation predictable, but it does give a reviewer something concrete to react to, which is usually what the reviewer wanted in the first place.
What this means for Thai marketers
Approval chains here often run through a client marketing manager who never logs into an ad platform, and sign-off happens over screenshots in a chat group. A link that renders the real ad and needs no account access fits that reality better than a folder of exported images.
- Decide who is allowed to generate and forward preview links. A link that works without a login is convenient in both directions.
- Keep a record of what was approved. A live preview reflects the current asset group, so the link is not an archive of a decision.
- Preview is a rendering check, not a performance check. It tells you the ad looks right, not that the offer or the landing page works, which is where ecommerce marketing results are actually decided.
Getting sign-off faster also puts pressure upstream. If creative can be reviewed in a day instead of a week, the bottleneck moves to producing assets worth reviewing, which is a content problem rather than a platform one.
Questions people are asking
Which campaigns does the Ad Preview Hub now cover?
Performance Max, in addition to Audience ads, which it already supported.
Do reviewers need a Microsoft Advertising login?
No. The hub generates a secure shareable link, and Microsoft states that only the person who generates the link and those they share it with can access the preview.
Is this the same as Google's Performance Max?
No. The two platforms use the same product name for different campaign types. This change applies to Microsoft Advertising.
Where do I find it?
Inside an asset group, using the "Preview ads" option.
What to do with this
If Microsoft Advertising is part of your media mix and creative approval is slowing launches, this is worth building into the process rather than treating as a curiosity. The workflow change is small. The calendar effect is not.
Relevant Audience plans and runs paid search across platforms, including approval workflows that clients can actually live with. Get in touch if creative sign-off is the thing holding your launches back.
