Performance Max: campaign setup, the placement and bidding decisions Google automates, and the businesses it fits

Performance Max (PMax) is Google Ads’ goal-based campaign type that reaches all major Google inventory from a single campaign and is designed to complement keyword-based Search campaigns. This page is a decision checklist: what PMax is, what you configure, what Google automates, what controls and reporting you now have, and how to decide if it fits your business, with creative depth covered separately in the dedicated PMax creative guide.

What Performance Max is and where one campaign can serve

Performance Max is defined by Google as a goal-based campaign type that reaches all Google Ads inventory from a single campaign. Per Google’s documentation, this includes YouTube, Display, Search, Discover, Gmail, and Maps, and it is positioned to complement keyword-based Search campaigns rather than replace them.

One PMax campaign can therefore participate in Search and Shopping style inventory, video placements on YouTube, visual placements on the Display Network, and feed-style placements on Discover and Gmail. Google’s systems decide where to show your ads across these surfaces based on your conversion goals and the assets you provide. This reach is the core appeal: a single budget and bidding objective applied across Google’s major properties.

A common misconception is that PMax replaces Search campaigns. Google’s own guidance is that PMax is designed to complement keyword-based Search, and they explicitly prioritize exact match Search keywords over PMax when the same query is eligible. In practice, this means you can keep high-intent, tightly controlled Search coverage while using PMax to expand reach and fill in the rest of Google’s inventory.

What you configure at setup and how audience signals behave

PMax setup centers on a small set of inputs. You choose conversion goals and values, and you select a bidding objective of either Maximize conversions or Maximize conversion value, with the option to set a target CPA (cost per acquisition) or target ROAS (return on ad spend). You then build asset groups, which are collections of creative assets that Google will mix into ads across channels.

You can optionally add audience signals, which are hints about who is likely to convert, and optional search themes, which are short phrases describing what your customers search for. You also choose whether to enable Final URL expansion, which lets Google replace your specified final URL with a more relevant landing page and generate a matching dynamic headline and description. Google’s help pages state that you remain responsible for compliance and accuracy of those dynamically generated assets.

A key point for evaluators is that audience signals are not targeting. Google’s own comparison tables describe PMax audience handling as having “no hard targeting,” and their guidance is that audience signals are used to accelerate learning. This corrects a common misconception that audience signals are strict targeting: PMax can and does serve outside the audiences you provide, using those signals as starting points rather than boundaries.

What Google automates and where you cannot intervene

PMax is built on Google’s automation stack, and several core functions are not under manual control. Bidding is fully automated Smart Bidding, limited to conversions or conversion value. Per Google’s comparison tables, PMax supports Maximize conversions and Maximize conversion value, each with optional CPA or ROAS targets, and does not support bidding to clicks or impression share. This directly corrects the misconception that you can bid PMax to clicks or Target impression share.

Placements across YouTube, Display, Search, Discover, Gmail, and Maps are also automated. You cannot set manual placement targeting, and you cannot specify keywords for targeting in the way you would in Search campaigns. Device-level bid adjustments and portfolio bid strategies are not available for PMax, and PMax cannot use shared budgets, according to Google’s comparison and portfolio strategy documentation.

Creative mixing is another automated layer. Within each asset group, Google combines headlines, descriptions, images, videos, and other assets into ads tailored to each channel. You do not control which specific combination serves in a given auction. Google provides asset-level and asset-group-level reporting with conversion metrics, but their documentation states that conversion credit is not split across assets in an ad, so asset-level conversion counts can legitimately sum to more than the asset group total. This corrects the misconception that asset-level conversions should add up neatly to campaign totals.

Available controls: negatives, brand exclusions, channels, and search themes

Despite the automation, the control surface for PMax has expanded meaningfully. Google’s help pages document campaign-level negative keywords, which rolled out in 2025 with an initial cap of 100 and were later expanded to 10,000 per campaign, with support for applying negative keyword lists. These negatives apply to Search and Shopping inventory. There are also account-level negative keywords with a cap of 1,000 entries, which apply across campaigns.

Brand exclusions are another key control. Per Google’s guidance, brand exclusions apply to Search, Shopping, and YouTube search inventory and are designed to catch misspellings and foreign script variants of your brand. This is central if you want to keep branded queries out of PMax and handle them in separate Search campaigns, a topic covered more deeply in the dedicated brand bidding reference.

Channel prioritization and budget allocation controls have also been documented. Google groups Search, YouTube, Maps, Gmail, and Discover as “Google channels” to preserve cross-channel optimization, while Search partners and the Display Network can be assigned separate priority tiers and optional daily budget allocations. This gives you some influence over where spend flows, without breaking the unified optimization across core Google surfaces.

Search themes are a final control worth calling out. Google’s help pages state that you can add up to 50 search themes per asset group, each up to 80 characters. These themes describe the types of searches you want to appear on and, per Google’s prioritization rules, carry the same priority as phrase and broad match keywords when compared to PMax in auctions. They are not keywords in the traditional sense, but they are a way to steer PMax toward or away from certain query spaces.

These controls, combined with content suitability settings at the account level, address the misconception that PMax is uncontrollable. While you cannot micromanage placements or bids, the 2025 control set of 10,000 campaign negatives, brand exclusions, channel prioritization tiers, and search themes gives you meaningful levers to shape where PMax participates.

2025 reporting additions: channels and search terms

In 2025 Google introduced two major reporting upgrades for PMax. The first is channel-level reporting via the Channel performance page, which Google described as a top-requested feature. This report breaks out performance by channel, such as Search, Shopping, Display, and YouTube, so you can see where conversions and conversion value are coming from within a PMax campaign.

The second is a full search terms report for PMax. Previously, advertisers only had access to search term insights, which were aggregated and less actionable. Google’s updated help pages describe a search terms report that exposes the queries that triggered your PMax ads, and they explicitly recommend using this report to apply campaign-level negative keywords or brand exclusions where needed.

Together, channel performance and search terms reporting change how evaluators can assess PMax. You can now see which channels are driving results and which queries are being matched, then use negatives and brand exclusions to refine coverage. This also supports a more informed read on whether PMax is finding incremental demand or leaning too heavily on branded or low-quality queries.

How Performance Max interacts with Search campaigns

Google documents clear interaction rules between PMax and Search campaigns. When a user’s query matches an exact match keyword in your Search campaigns, that Search campaign is prioritized over PMax for that auction. This directly addresses the misconception that PMax simply replaces Search, and it gives you a way to protect your highest value exact queries.

Search themes in PMax are treated differently. Per Google’s guidance, search themes carry the same priority as phrase and broad match keywords. In auctions where there is no exact match keyword, PMax with relevant search themes and your Search campaigns with phrase or broad match keywords can both compete. This means your Search structure and your choice to use or omit search themes in PMax influence how traffic is split.

For evaluators, the practical takeaway is that you can reserve exact match Search for the queries where you want full control, while allowing PMax to explore broader demand and cross-channel opportunities. You then use the PMax search terms report and your Search query data together to decide where to add or remove exact keywords, negatives, or search themes.

Business fit and Temper And Forge’s operating approach

Google positions PMax as a way to “multiply conversions” by applying automation across all its properties, and a 2024 Google blog post reported that more than 90 quality improvements to PMax increased conversions or conversion value by over 10% based on Google’s internal data. That figure is Google’s own claim, not an independent measurement, but it frames why many advertisers see PMax as a strong default for performance-focused campaigns.

Business fit is nuanced. PMax relies on good creative assets and clear conversion goals, and its strengths differ by business model. Detailed fit by business type, including where PMax shines for feed-based ecommerce and where it struggles for some lead generation setups, is covered in the dedicated business-fit guide. What matters for evaluation here is that PMax is not universally right or wrong; it is contingent on assets, data quality, and tolerance for automation.

Temper And Forge’s documented practice is that in almost all cases TF wants to run PMax, and it is generally favored over traditional search ads on Google. That preference is asset-contingent: if a client has strong video or TF can help build strong video and visual content, PMax is generally the most successful path, especially for Shopping, where seeing and visually interacting with the product matters. TF acknowledges that PMax is a black box compared to traditional Search and manages it by ROAS as the keep-or-kill metric, using observable asset and channel performance as directional, interpretive signals rather than fully attributable proof. Video is the standout asset, and TF sees video perform particularly well when PMax syndicates it across Google’s properties, which is where PMax’s coverage advantage lives.

From a decision standpoint, this leads to a simple evaluation pattern. If you can define reliable conversion goals and values, are willing to judge success on ROAS or CPA, and have or can create strong visual and video assets, PMax is usually worth testing with a meaningful budget and at least 6 weeks of runway, as Google recommends for ramp. If ROAS or CPA does not meet your thresholds after that learning period, TF’s practice is to treat that as a kill signal for the current configuration, using the channel and search terms reporting to decide whether to iterate assets and structure or reallocate budget elsewhere.