Google Performance Max Partner Network Selection: What the Alpha Changes
Google is alpha-testing independent partner network controls for Performance Max campaigns, allowing advertisers to toggle Search Partner Network and Google Display Network separately for the first time. For brands where partner placement quality directly affects ROAS or brand safety, this changes how PMax campaigns are configured.
Google Performance Max Partner Network Selection: What the Alpha Changes
Google is testing independent partner network controls for Performance Max campaigns in alpha, allowing advertisers to select Search Partner Network and Google Display Network separately for the first time. Previously, Performance Max bundled both networks with no independent toggle: advertisers either accepted both or neither. The alpha gives accounts a new dial -- disable lower-converting partner placements while keeping full access to core Google Search and Display inventory. For brands where partner placement quality directly affects ROAS or brand safety requirements, this is a meaningful change in how PMax campaigns can be configured.
Key takeaways
- Google's PMax partner network selection alpha enables independent control of Search Partner Network and Google Display Network -- previously bundled as one setting with no separation.
- The alpha allows advertisers to disable lower-converting or off-brand partner placements while maintaining full access to core Google properties.
- Partner network exclusion is most impactful in verticals where partner placements historically underperform: B2B lead gen, compliance-sensitive industries, and premium brands with strict placement quality requirements.
- Before applying partner exclusions broadly, run 2-4 weeks of baseline measurement comparing ROAS and conversion quality with and without partner network traffic to isolate the actual impact.
- Prooflytics surfaces PMax placement-level performance signals when your Google Ads account is connected, flagging when partner network traffic correlates with conversion quality changes in your account.
Why partner network control matters in Performance Max
Performance Max was designed as a fully automated campaign type -- Google's systems choose which networks to run ads on, which creative assets to use, and how to allocate budget. The tradeoff for that automation has always been reduced advertiser control. Partner network selection is one area where that tradeoff has historically been painful: many advertisers found their PMax spend flowing to Search Partner Network sites and Google Display placements that converted at lower rates than core Google Search, with no mechanism to limit that traffic.
Search Partner Network: A collection of search engines, websites, and apps that partner with Google to display search ads. Partners include sites like Google.com variants, YouTube, Amazon, and hundreds of smaller search properties. Traffic quality varies significantly across partners.
Google Display Network: The broader display advertising network encompassing millions of websites, apps, and Google properties. Within PMax, Display placements are served automatically alongside Search, Shopping, Video, and Discover.
Previously, if a PMax advertiser wanted to exclude partner placements, the only option was to exit Performance Max entirely and rebuild campaigns in individual campaign types where network exclusions are available. That tradeoff -- losing PMax's automated optimization in exchange for network control -- was often not viable for accounts where PMax was the primary campaign structure.
The alpha changes that calculus. Independent network controls inside PMax mean advertisers can retain the campaign's automated bidding and creative optimization while applying targeted placement restrictions. It follows Google's earlier moves to add placement exclusions and search term reporting visibility to PMax -- a pattern of gradually restoring control without dismantling automation.
What the data shows about partner network performance in PMax
The ICP problem this creates for performance teams: Performance Max campaigns aggregate results across all networks by default, making it difficult to diagnose whether a conversion rate decline originates from core Google Search inventory or from partner placements. A campaign showing a 15% ROAS decline could be performing well on Google.com Search while converting poorly on partner sites -- but without network-level breakdown, the optimization action is unclear.
Operational data across PMax accounts consistently shows that partner network performance varies significantly by vertical and by audience targeting. In B2B lead generation specifically, Search Partner Network sites tend to produce lower-intent traffic than core Google.com Search -- the query may be the same, but the user context on a smaller partner search property is often different from a direct Google search session. This compounds the conversion signal quality problem that auto-classified customer lists address: mixed-quality traffic degrades Smart Bidding signals at two levels, the network level and the audience classification level. Premium ecommerce brands frequently find Display Network placements from PMax appear on lower-quality inventory compared to targeted Standard Display campaigns with placement exclusions.
The alpha's independent controls address this by giving advertisers a mechanism to test partner network contribution to their specific account before committing to an exclusion. Run with partner networks enabled (the current default) for a baseline period, then enable the exclusion toggle for a test period. Compare ROAS, conversion rate, and cost-per-conversion between the two periods.
Prooflytics surfaces this pattern in the daily briefing when your Google Ads account is connected -- flagging when PMax conversion rates shift in ways that suggest traffic composition changes, which can point to partner network traffic as a variable worth isolating.
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Which accounts should prioritize testing the alpha
The alpha is worth requesting access to early if your account meets one or more of these criteria:
Brand safety requirements. If your brand has placement quality commitments -- specific industry compliance requirements, advertiser standards around content adjacency, or internal policy on which environments your ads appear in -- partner network control is a meaningful risk reduction tool. PMax's current lack of placement exclusion at the network level is a brand safety gap for regulated advertisers.
B2B lead generation with strict quality thresholds. In B2B campaigns where each lead feeds into a sales pipeline with a defined qualification process, partner network traffic that inflates lead volume without equivalent pipeline contribution creates noise in conversion data and degrades Smart Bidding signal quality. Excluding partner traffic allows conversion data to reflect only the intent signals Google considers highest quality.
Ecommerce with product-level ROAS targets. For ecommerce advertisers running PMax with product-level metrics now available in the Google Ads API, Display placements from partner networks may reach users at different funnel stages than the intent-driven Search inventory PMax was primarily built around. If Display placements are pulling budget from higher-converting Search inventory, partner exclusion may improve overall ROAS without reducing conversion volume.
Accounts with historical data showing partner underperformance. If your account previously ran campaigns in older formats where partner network performance was visible (Standard Shopping, Search campaigns with partner network enabled/disabled), that historical data provides a prior for what partner exclusion is likely to produce in PMax.
How to access and test the alpha
Google typically rolls out PMax feature alphas through account manager channels and beta waitlists. Standard access process:
Step 1: Check your account dashboard. Some accounts receive alpha features automatically based on spend thresholds, vertical, or account history. Check Performance Max campaign settings for a new partner network control section -- if it appears, your account already has alpha access.
Step 2: Request access through your Google Ads representative. Managed accounts (typically $50K+/month spend) can request alpha access through their dedicated Google account manager. Describe your use case -- brand safety, lead quality, or ROAS optimization -- as accounts with a clear business rationale for partner control are prioritized for alpha expansion.
Step 3: Establish a pre-test baseline first. Before enabling partner exclusions, run a 2-4 week baseline period with the current default settings (partner networks enabled) and export conversion performance by network if the reporting becomes available. This baseline is your comparison point.
Step 4: Enable the exclusion and monitor for 2-4 weeks. After enabling partner network exclusion, allow the same time window for PMax's bidding algorithm to adjust. PMax bidding adapts to available inventory -- reducing partner traffic may initially cause impression volume to drop as the algorithm reallocates, which can temporarily affect conversion volume even if conversion rate improves.
Step 5: Evaluate on ROAS and lead quality, not just volume. If conversion volume decreases but ROAS improves, that is generally the correct signal -- you are removing lower-efficiency traffic. If both conversion volume and ROAS decline, partner traffic may have been contributing positive ROAS that the exclusion removed. The test result may be account-specific.
What this change signals about PMax's trajectory
Google has historically resisted adding granular controls to Performance Max, positioning the automation-first approach as the product's core value. The partner network selection alpha represents a shift in that posture -- acknowledging that full automation without placement transparency creates real problems for advertisers with quality requirements.
Previous steps in this direction: Google added placement exclusions to PMax in 2022 (website exclusions), asset group-level reporting in 2023, and search term reporting visibility in 2024. Partner network independent selection continues a pattern of gradually restoring campaign-type-level controls that were removed when PMax replaced Smart Shopping and Local campaigns.
For advertisers, this trajectory matters: it suggests Google is willing to add more controls to PMax over time as advertiser feedback accumulates. The current alpha should be interpreted not just as a one-feature update but as a signal that the PMax control surface will continue expanding.
Bottom line
- Google's Performance Max partner network selection alpha allows independent control of Search Partner Network and Google Display Network for the first time -- previously bundled with no toggle.
- The alpha is most impactful for B2B lead gen, brand-safety-sensitive advertisers, and accounts with historical data showing partner placements underperform core Google inventory.
- Test by establishing a 2-4 week baseline before enabling exclusions, then evaluate ROAS and conversion quality (not just volume) after the change.
- Check your PMax campaign settings for the alpha toggle, or request access through your Google Ads account manager.
- Review independent analysis of Google Ads automated campaign tools on G2.
Frequently asked questions
Will enabling partner network exclusion reduce my campaign reach?+
Yes, excluding partner networks reduces available inventory -- that is the point. The question is whether the remaining inventory (core Google properties) produces better ROAS than the mixed partner-plus-core inventory. In accounts where partner placements underperform, reduced reach with higher efficiency is the expected and desired outcome. In accounts where partner placements contribute positive ROAS, exclusion may reduce both reach and total conversions.
Does this affect YouTube placements in Performance Max?+
YouTube is a core Google property, not a partner network. PMax YouTube placements are not affected by Search Partner Network or Google Display Network exclusions. YouTube video inventory within PMax would remain available regardless of partner network selection settings.
Is the partner network alpha available in all countries?+
Alpha features typically roll out to selected markets first, with US and UK accounts often receiving access earlier. Google has not published a specific market rollout schedule for this alpha. Check your account settings directly, as availability varies by account and market.
Does excluding partner networks affect Product Listing Ads in Shopping campaigns?+
The partner network alpha applies specifically to Performance Max campaigns. Standard Shopping campaigns have had separate Search Partner Network controls for years -- this is a new capability being added to PMax specifically. If you run both Standard Shopping and PMax in parallel, each campaign type manages partner network settings independently.
How does partner network exclusion interact with Audience Signals in PMax?+
Audience Signals inform which users PMax targets, not which networks it uses. Excluding partner networks limits WHERE ads appear, while Audience Signals affect WHO sees them. The two settings operate independently. An account with strong Audience Signals may still see efficient partner traffic if the signals identify high-intent users on partner properties -- but in practice, restricting to core Google inventory tends to concentrate traffic on higher-intent search sessions regardless of audience quality.
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