One of the biggest differences between Performance Max (PMax) campaigns and other campaigns is audiences. This is a part of the campaign that often gets sidelined, yet it's a key element of PMax management—since small changes can yield huge improvements.

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Error 1: Confusing Signals with Traditional Targeting

The most critical mindset shift with PMax is understanding that an audience signal is NOT restrictive targeting. The algorithm will prioritize these signals to show ads to users, but it is not limited to them.

• In a traditional Search or Display campaign, if you add an audience, Google only shows ads to that audience.
• In PMax, adding a signal is like telling Google: "Start looking for customers similar to these." Once the algorithm learns who converts, it will expand reach beyond the original signal if it detects performance. The signal serves solely to accelerate the initial learning phase and keep the system from wasting time and money testing blindly.

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2. Audience Signal Value Hierarchy

Not all audience signals carry the same weight. To get the best results, you must feed the system while respecting data quality:

First-Party Data — The most powerful signals

• Conversion Remarketing Lists: Recent buyers, high lifetime value (LTV) users, active subscribers.
• Customer Match (Customer lists): Uploading emails and phone numbers of your best customers is the most precise input you can feed PMax. *Remember to keep these customer lists updated.

Custom Segments

• Search Intent: Create a segment using the highest-converting keywords from your Search campaigns. This is one of the most effective indirect signals for PMax.
• Competitor or Related URLs: Include domains of your direct competitors or websites your ideal customer visits.

Google In-Market and Affinity Audiences

• Use In-Market or Affinity segments only as a complement or when you don't have enough first-party data volume.

Avoid filling this out aimlessly, as your signals may get diluted, especially if you choose overly broad segments like "online shoppers" or "foodies."

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Advanced Strategies to Structure Your Signals in PMax

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To get the most out of your campaigns, apply these best practices to your Asset Group structure:

1. One Asset Group = One Specific Angle or Audience: If you sell sportswear, don't mix "Running" and "Yoga" signals in the same Asset Group. Create one asset group with images, copy, and signals specific to Running, and another separate group for Yoga.
2. Exclude existing customers from acquisition campaigns: If your goal is New Customer Acquisition, make sure to use customer acquisition features or add your remarketing lists as account/campaign-level exclusions. *Keep in mind that you usually need lists with a minimum number of customers to use these features.
3. Don't overload the system: Adding 20 different signals to a single Asset Group will only confuse the algorithm. Keep it to 2 to 4 highly relevant data sources per group.

From the Dolnai platform, we recommend:

• Analyzing copy and image relevance against the target audience: Having a precise Custom Segment is useless if your creative assets don't speak to that audience's pain points or interests.
• Detecting keyword cannibalization: Check whether your search intent signal in PMax is stealing traffic from your exact match Search campaigns that have better margins.
• Monitoring Asset Performance: Correlate which asset groups and signals are driving high-quality impressions and which are losing efficiency. Analyze this from the new Assets Insights section.

Conclusion

Audience signals aren't a "set it and forget it" setting; they are the primary lever to train Google Ads AI with your business's data. If you feed it clean First-Party Data and genuine search-intent segments, you'll cut down learning time by weeks and boost your margins from day one.