For years, Performance Max (PMax) campaigns have been one of the most powerful — and most debated — tools inside Google Ads. Marketers appreciated the scale and automation that allowed a single campaign to run across multiple Google surfaces. But the lack of transparency created a common frustration. Advertisers could see overall campaign results, yet had very little insight into where their budgets were actually being spent.

This led to a common perception of PMax as a “black box”. Campaigns could perform well, but explaining how they worked — especially to internal stakeholders — was often difficult.

With the introduction of channel-level reporting, advertisers can finally see how Performance Max campaigns distribute activity across different Google networks. First introduced in 2025 and expanded across accounts through 2026, the feature brings a new layer of transparency to one of Google’s most automated campaign types.

While the update does not allow advertisers to manually control placements or budgets by channel, it provides valuable insight into how Google’s automation allocates spend and drives results.

How to Access Channel-Level Reporting

One of the biggest advantages of the update is that the data is now available directly within the Google Ads interface.

To view channel performance:

1. Navigate to Campaigns in Google Ads.
2. Open the Insights and reports dropdown.
3. Select Channel performance.

The report provides both visual and tabular breakdowns of how your Performance Max campaigns are delivering across Google’s different advertising environments. For marketing teams managing multiple campaigns, this makes it much easier to analyse campaign distribution without relying on scripts, APIs, or external reporting tools.

What the Channel Report Shows

The channel performance report shows how your Performance Max campaigns distribute activity across various Google surfaces, giving advertisers greater visibility into where results are coming from. It allows you to analyse key metrics such as impressions, clicks, cost, conversions, and conversion value, all broken down by channel.

These channels include Google Search and Search Partners, YouTube (including Shorts inventory), the Google Display Network, Discover, Gmail, and even Google Maps when location assets are enabled. With this level of insight, advertisers can start answering questions that were previously difficult to explore within PMax—for instance, which networks are driving the most conversions, whether a single channel is consuming a disproportionate share of the budget, or if certain placements are underperforming.

While advertisers still don’t have control over budget allocation by channel, this added transparency makes it much easier to understand overall campaign performance across Google’s ecosystem.

Turning Channel Insights Into Optimisation Opportunities

Channel-level reporting does not change the automated nature of Performance Max, but it gives advertisers more context for strategic decisions. Here are three practical ways marketers can use the new data.

1. Identify Creative Asset Gaps

If your campaign report shows limited engagement or conversions from YouTube, the issue may be creative rather than targeting. Many advertisers rely on Google’s automatically generated videos when running Performance Max campaigns. While convenient, these assets rarely perform as strongly as dedicated video creatives.

Campaigns that include native video assets — such as vertical 9:16 formats for Shorts and 16:9 formats for standard placements — tend to perform more effectively across YouTube inventory. Channel reporting can help highlight whether video placements are underperforming and where stronger creative may be needed.

2. Understand How Search Inventory Contributes to Results

For retail advertisers using product feeds, Performance Max campaigns often surface ads within Search results using feed-based product data. Channel reporting allows marketers to evaluate how much of their performance is coming from Search inventory, compared with other placements like Display or YouTube.

If Search placements are absorbing significant spend without delivering strong conversion value, it may signal that campaign inputs need refinement. Tightening Search Themes, improving product feed quality, or introducing brand exclusions can help guide the algorithm toward more valuable traffic.

3. Refine Creative Strategy Across Environments

Different Google environments reward different types of creative. For example:

• Product-focused visuals may convert well in Search environments
• Lifestyle imagery often performs strongly on Display placements
• Short-form video can drive engagement on YouTube and Shortst

While the current reporting focuses on campaign-level performance by channel, advertisers can combine these insights with asset performance data to better understand how creative elements contribute to results.

Over time, this allows teams to develop more tailored asset strategies rather than relying on a single set of creatives across every network.

Why This Update Matters

Channel-level reporting represents an important shift in how automated advertising tools are evolving. Performance Max remains heavily driven by machine learning, but advertisers increasingly expect greater transparency alongside automation. Understanding where campaigns are delivering impressions and conversions helps marketers evaluate whether their inputs — such as creative assets, product feeds, and audience signals — are working effectively.

When combined with other updates such as AI-driven text guidelines, which allow advertisers to control how automated copy is generated, Performance Max is gradually becoming a more collaborative system between marketers and algorithms. Instead of relying purely on automation, advertisers now have better insight into how their campaigns operate.

The Future of Performance Max Optimisation

As automation continues to shape digital advertising, the role of marketers is evolving. Success is no longer just about launching campaigns. It increasingly depends on providing strong inputs — high-quality creative, well-structured product feeds, clear audience signals, and meaningful campaign data.

Channel-level reporting gives advertisers another layer of understanding within that system. By revealing how Google distributes activity across its networks, marketers can make more informed decisions about campaign strategy and creative investment. Rather than treating Performance Max as a black box, advertisers can begin analysing how different parts of Google’s ecosystem contribute to performance.

Want to understand how your Performance Max campaigns are actually distributing spend across Google’s networks?

Digital 38 helps brands audit, optimise, and scale automated advertising campaigns with data-driven performance strategies. Speak to our team today to maximise your PMax campaign strategy,