Microsoft Advertising is offering Messaging guidelines in an open beta for Performance Max and Search campaigns enabled with AI Max.
Advertisers can input up to 40 guidelines to instruct Copilot on brand messaging and creative adaptation.
However, these guidelines may not be enforced as hard rules if they conflict with existing assets, such as landing pages. For instance, a guideline for sentence-case headlines might still lead to title-cased outputs if that’s how your existing headlines are structured.
Microsoft suggests writing guidelines as if briefing a team member, with clear language and explanations of brand-specific terms.
This update builds on previous messaging guideline coverage in October where it was in closed pilot, and then opened to more advertisers.
Read the official announcement here: Product Newsletter.