What Is PMax? How Performance Max Works With Search Campaigns 

Performance Max is one of the most debated campaign types in Google Ads. Some advertisers swear by it, while others see it as little more than Search advertising with less control and transparency.

Performance Max, commonly shortened to PMax, is a goal-based Google Ads campaign type that uses automation to display adverts across Google’s advertising channels from one campaign. These include Search, Shopping, Display, YouTube, Discover, Gmail and Maps.

When Google introduced Performance Max, many advertisers assumed it would eventually replace traditional campaigns such as Search and Shopping. However, from the accounts we manage at Talk To Media, we generally find that PMax works best alongside well-structured Search campaigns rather than replacing them completely.

That does not mean it should simply be switched on and left to run. Although Performance Max relies heavily on automation, it still requires reliable conversion data, suitable creative assets, clear objectives and ongoing management.

What does PMax mean in Google Ads?

PMax is an abbreviation of Performance Max.

A Performance Max campaign allows advertisers to promote products or services across Google’s advertising inventory without creating a separate campaign for every channel. Google uses its machine-learning systems to decide:

• Who should see an advert
• Which channel or placement should be used
• Which combination of assets should be shown
• How much should be bid in each auction
• Which users are most likely to complete the chosen conversion action

The advertiser still controls important elements such as the budget, location targeting, campaign objectives, conversion goals and creative assets. However, Google has more control over where adverts appear and how the available assets are combined.

This makes Performance Max quite different from a traditional Search campaign, where the advertiser normally has more direct control over keywords, adverts and search queries.

If you are unfamiliar with paid search generally, our Google Ads management page provides a broader explanation of how paid campaigns can generate leads and sales.

Where can Performance Max adverts appear?

A Google Performance Max campaign can display adverts across several Google-owned channels and placements:

• Google Search: Text or product adverts shown alongside search results.
• Google Shopping: Product listings generated using information from a linked Merchant Center feed.
• Google Display Network: Visual adverts shown across participating websites and apps.
• YouTube: Video, image and text-based adverts shown across YouTube.
• Discover: Visual adverts shown within personalised Google content feeds.
• Gmail: Adverts displayed within Gmail.
• Google Maps: Relevant local adverts and promoted business information.

An advert will not necessarily appear equally across every channel. Google distributes the budget according to where its system predicts that conversions or conversion value are most likely to be generated.

This wide coverage is one of the main benefits of Performance Max, but it is also one of its limitations. Advertisers may have less control over where their budget is spent than they would with separate Search, Display or YouTube campaigns.

One Performance Max campaign can serve adverts across Google’s advertising inventory.

How does a Performance Max campaign work?

Performance Max uses Google AI and Smart Bidding to optimise towards a selected objective. This could include:

• Online purchases
• Enquiry form submissions
• Telephone calls
• Appointment bookings
• Store visits
• Revenue or conversion value
• New customer acquisition

The system uses conversion data alongside signals such as search behaviour, location, device, audience characteristics and previous interactions with the business.

Several important parts work together within a PMax campaign.

Conversion goals

Conversion goals tell Google what the campaign is expected to achieve.

For an ecommerce business, this may be completed purchases and revenue. For a lead-generation business, it could be qualified enquiry forms or telephone calls.

The quality of this data matters. If every form submission is treated as valuable, Google may optimise towards generating the greatest number of forms rather than the greatest number of suitable enquiries.

From what we see when managing campaigns, poor conversion tracking is one of the quickest ways to give automation the wrong instructions. Performance Max can only optimise towards the data it receives.

Asset groups

An asset group contains the materials Google can use to build different adverts. These may include:

• Headlines
• Longer headlines
• Descriptions
• Images
• Logos
• Videos
• Calls to action
• Landing pages

Asset groups should usually be organised around closely related products, services or audience needs. Grouping unrelated services together can make it harder for Google to create a relevant advert and send visitors to the right landing page.

Performance Max combines supplied headlines, descriptions, images and other assets to create adverts for eligible Google channels.

Audience signals

Audience signals provide Google with an indication of the people most likely to be interested in the offer.

Signals can include:

• Website visitors
• Customer Match lists
• Custom segments
• Demographic information
• People with particular interests
• Users researching related products or services

Audience signals are not always strict targeting restrictions. Google can move beyond them when its systems identify other users who may be likely to convert.

Search themes

Search themes allow advertisers to provide information about the words and phrases their customers may use. They help Google understand the campaign and identify relevant demand that may not be immediately apparent from the website or existing data.

They are useful guidance, but they do not provide the same level of control as keywords in a Search campaign.

Search themes and audience signals help Google understand relevant searches and the types of people a Performance Max campaign should initially prioritise.

Smart Bidding

Performance Max uses one of four automated bidding strategies, selected according to the campaign objective: Maximise Conversions, Maximise Conversion Value, Target CPA or Target ROAS.

The system adjusts bids for individual auctions using the signals available at that particular moment.

Performance Max vs Search campaigns

Search campaigns are often better when a business needs close control over the services, queries or locations being targeted. Performance Max can be useful when the objective is to find additional conversions across a wider selection of placements.

In our view, the decision should not be framed as choosing either Search or PMax. The more useful question is what role each campaign should play within the account.

Does Performance Max compete with Search campaigns?

Performance Max and Search campaigns can both become eligible for the same search activity, but that does not mean they simply bid against each other and increase the advertiser’s costs.

Google uses prioritisation rules to decide which campaign or asset group enters an auction. An eligible exact-match keyword that is identical to the user’s search term will generally be prioritised over Performance Max. In other situations, relevance and Ad Rank can influence which campaign is selected.

There are exceptions. A Search keyword may not be eligible because of limited budget, targeting settings, low search volume, a disapproved advert or another restriction.

This is one reason Search and PMax campaigns should be planned together. Their budgets, objectives, landing pages and targeting should support a wider account strategy rather than being managed as completely separate activities.

Google provides more detail about this in its guide to ad group and asset group prioritisation.

Can Performance Max improve Search campaign performance?

Performance Max does not directly optimise a separate Search campaign. However, introducing it can change the overall mix of traffic, conversions and available account data.

PMax can reach people through additional placements and at different stages of their journey. It can also identify demand that is not being reached by the existing Search keywords.

This may contribute to stronger overall account performance, but it is important not to assume that every improvement in Search results was caused entirely by Performance Max. Demand, competition, seasonality, website changes and other account activity can also influence performance.

Our own experience suggests that PMax can complement Search when both campaigns have clearly defined roles, reliable conversion tracking and suitable budgets.

Search campaigns provide greater control over defined searches, while Performance Max can expand reach across additional channels.

In this account, Search conversions increased by 125% and cost per acquisition fell by 71.83% after Performance Max was introduced.

Why lead quality matters in Performance Max

Performance Max sometimes generates lower-quality leads because it reaches a broader audience and may identify relatively inexpensive conversion opportunities.

If an account records every form submission as a conversion, Google will look for more people likely to submit that form. It cannot automatically know which enquiries later become customers unless that information is returned to the advertising platform.

In our real example, the client’s enquiry form only allowed people who met specific criteria to submit it. Every conversion recorded in the account was therefore already pre-qualified.

This provided Google with a much clearer signal of what a valuable user looked like.

Put simply, if the data going into the campaign is poor, the decisions coming out of it are unlikely to be much better.

Businesses can improve lead-generation data by:

• Tracking meaningful actions rather than every possible interaction
• Separating primary and secondary conversions
• Filtering obvious spam submissions
• Recording qualified leads
• Importing offline conversion information where appropriate
• Assigning values based on lead quality
• Connecting advertising data with a CRM system

This is especially important for B2B Performance Max campaigns, where the number of leads may be lower and the difference between a genuine opportunity and a poor-quality enquiry can be significant.

Returning qualified-lead and sales data to Google can help Performance Max optimise towards more valuable enquiries.

What are the benefits of Performance Max?

The potential benefits of Performance Max include:

Wider reach

A single campaign can access Search, Shopping, Display, YouTube, Discover, Gmail and Maps. This can help advertisers reach people who would not have been captured by an existing keyword list.

More use of automation

Google can adjust bidding, targeting and creative combinations for individual auctions. This would be difficult to reproduce manually at the same scale.

Access to different stages of the customer journey

Search campaigns commonly capture existing demand. Performance Max can also introduce a brand earlier in the research process or reconnect with someone later.

Useful creative and audience information

Asset and audience reporting can indicate which messages, formats and audience groups are contributing to performance.

Support for ecommerce campaigns

Retailers can connect a Google Merchant Center product feed, allowing PMax to promote relevant products through Shopping and other eligible placements.

Potential for additional conversions

When the campaign has reliable data and sufficient budget, it may find valuable customers outside the reach of existing Search campaigns.

What are the disadvantages of Performance Max?

Performance Max is not suitable for every advertiser. Its main disadvantages include:

• Less control over individual placements
• Greater dependence on accurate conversion tracking
• The possibility of budget being spent on lower-value placements
• Automatically created assets that may not reflect the brand perfectly
• The risk of poor-quality leads when conversion signals are weak
• A learning period before performance can be judged fairly
• Difficulty identifying exactly why performance has changed

Automation can make a campaign easier to launch, but it does not make campaign strategy or ongoing optimisation unnecessary.

As we explain in our guide to common Google Ads mistakes, choosing the wrong campaign type or bidding strategy can waste budget even when the account is technically set up correctly.

What assets does a Performance Max campaign need?

The exact Performance Max requirements can change, so advertisers should check Google’s current PMax asset specifications before producing creative materials.

The principal requirements and recommendations include:

• Short headlines of up to 30 characters
• Long headlines of up to 90 characters
• Descriptions of up to 90 characters
• A verified business name
• A call to action
• A final landing-page URL
• Horizontal and square images
• A square business logo
• Optional portrait images
• Horizontal, square and vertical videos
• A Merchant Center product feed for retailers using Shopping inventory

Recommended image sizes include:

• Horizontal image: 1200 × 628 pixels
• Square image: 1200 × 1200 pixels
• Portrait image: 960 × 1200 pixels
• Square logo: 1200 × 1200 pixels
• Horizontal logo: 1200 × 300 pixels

If an advertiser does not provide video assets, Google may create videos automatically using the other materials in the asset group. We generally prefer businesses to supply their own suitable videos where possible because this provides better control over how the brand is presented.

What is Final URL expansion?

Final URL expansion allows Performance Max to replace the landing page supplied by the advertiser with another page from the same website when Google believes it is more relevant to the user’s intent.

This setting is enabled by default. It may help a campaign match people with more relevant content, but it can also direct traffic to pages the advertiser did not intend to promote.

Advertisers should review:

• Which URLs are receiving paid traffic
• Whether non-commercial pages should be excluded
• Whether the website contains old or unsuitable landing pages
• Whether different services need separate asset groups
• Whether a page feed would provide useful guidance

If the campaign must send every visitor to one specific landing page, Final URL expansion can be turned off. URL exclusions can also prevent the campaign from using particular pages.

Performance Max best practices

There is no single PMax strategy that will work for every business, but several principles apply to most campaigns.

Start with accurate conversion tracking

Do not launch the campaign until the actions being used for optimisation genuinely reflect the business objective.

Give each campaign a clear purpose

Avoid combining unrelated services, products or objectives simply because Performance Max can technically cover them.

Supply strong creative assets

Provide relevant text, images, logos and videos in several formats. Do not rely entirely on Google to generate the creative.

Use meaningful audience signals and search themes

Supply useful first-party audiences, customer lists and search information to help the system understand who you want to reach.

Review landing pages and URL expansion

Make sure paid visitors are being directed to pages that match their needs and provide a clear route to conversion.

Use exclusions where necessary

Brand exclusions, negative keywords, account-level placement exclusions and URL exclusions can help prevent inappropriate traffic or protect parts of the existing campaign structure.

Allow time for learning

Google recommends allowing a new Performance Max campaign to run for at least six weeks so it can collect enough information for optimisation and comparison. Avoid making major changes every few days unless there is a clear problem that needs immediate attention.

Judge business results, not just platform conversions

A campaign that generates more conversions is not necessarily more profitable. Review lead quality, completed sales, revenue, cost per acquisition and return on advertising spend.

Avoid treating automation as a shortcut

From the campaigns we manage, Performance Max tends to work best when Google receives accurate data and the advertiser remains actively involved. Giving the system more automation does not compensate for unclear objectives, weak assets or poor tracking.

The available budget also needs to be realistic. Our guide to how much Google Ads costs explains some of the factors that influence advertising costs and budget requirements.

Is Performance Max suitable for small businesses?

Performance Max can work for a small business, but it is not automatically the best starting point.

A small business may benefit when it has:

• A clear product or service
• Reliable conversion tracking
• Enough conversion activity for Google to learn from
• Good landing pages
• Suitable creative assets
• A realistic testing budget
• Someone available to monitor lead quality and campaign performance

A tightly controlled Search campaign may be a more suitable starting point when the budget is limited or the business only needs to target a small number of clearly defined searches.

Performance Max may then be introduced once the account has collected useful conversion data and there is a clear reason to expand beyond Search.

Is Performance Max suitable for B2B advertising?

PMax can work for B2B campaigns, but lead quality and conversion volume require particular attention.

B2B sales journeys are often longer, and valuable prospects may not convert immediately after clicking an advert. The campaign may also struggle to distinguish between a decision-maker, a job seeker, a student and someone looking for free information.

Strong qualification forms, CRM integration and offline conversion imports can help Google understand which enquiries create genuine business opportunities.

For B2B accounts, we would not judge Performance Max purely by the number of form submissions it generates. The more important question is whether those submissions progress into qualified leads and customers.

How should you review a Performance Max campaign?

A useful PMax review should consider more than the main conversions figure shown in Google Ads.

Review:

• Conversion volume and conversion value
• Cost per acquisition
• Return on advertising spend
• Lead quality
• New and returning customers
• Search-term insights
• Performance by asset group
• Asset performance
• Landing pages receiving traffic
• Final URL expansion
• Product feed performance
• Audience insights
• Geographic performance
• Changes in other campaigns
• Results recorded in GA4 and the business’s CRM

Performance Max should also be assessed alongside Search and other campaigns. A lower reported CPA is not necessarily an improvement if PMax is capturing existing branded demand or conversions that another campaign would otherwise have received.

Frequently asked questions about Performance Max

What is a PMax campaign?

A PMax campaign is a goal-based Google Ads campaign that uses automation to display adverts across Google Search, Shopping, Display, YouTube, Discover, Gmail and Maps.

What is Google Performance Max used for?

Google Performance Max is used to generate conversions or conversion value across several Google advertising channels. It can support objectives such as ecommerce sales, leads, telephone calls, appointments and store visits.

Is Performance Max better than Search?

Neither campaign type is always better. Search provides greater keyword and query control, while Performance Max offers wider reach and more automation. Many advertisers use them together for different purposes.

Does Performance Max use keywords?

Performance Max does not use keywords in the same way as a traditional Search campaign. Advertisers can provide search themes, while Google also uses landing pages, assets, feeds, audiences and other signals to find relevant traffic.

Can Performance Max show on Google Search?

Yes. Performance Max adverts can appear on Google Search as well as Shopping, Display, YouTube, Discover, Gmail and Maps.

Can Performance Max run without a product feed?

Yes. Lead-generation and other non-retail businesses can run Performance Max without a Merchant Center product feed. Retailers can connect a feed to make products eligible for Shopping placements.

How long does Performance Max take to learn?

Google recommends allowing a new campaign to run for at least six weeks. The actual learning period depends on conversion volume, budget, goals and the extent of any campaign changes.

Can Performance Max generate poor-quality leads?

Yes. This can happen when the campaign receives weak conversion signals or is optimising towards every form submission equally. Better qualification and offline conversion data can help it focus on more valuable enquiries.

Should Performance Max replace Search campaigns?

Usually not automatically. Search campaigns remain useful when an advertiser needs greater control over keywords, adverts and specific customer intent. Performance Max can expand reach and complement Search when it has a clearly defined role.

Final thoughts

Performance Max is not a replacement for campaign strategy, and it certainly is not a campaign type that should be switched on and forgotten about.

It can help advertisers reach potential customers across more of Google’s inventory, but that increased reach comes with less direct control. Its performance depends heavily on the quality of the conversion data, creative assets, campaign structure and landing pages supplied to it.

From our experience managing Google Ads accounts, PMax is most useful when it is introduced for a clear reason and monitored as part of the wider account. It should complement Search campaigns where appropriate, not replace them simply because it offers more automation.

The example from our own account management shows that Search and Performance Max can work alongside one another successfully. However, the campaign still needs the right data, strategy and ongoing oversight to produce commercially useful results.