Performance Max (PMax) is Google’s AI-driven campaign type that automatically runs ads across all Google channels — Search, Display, YouTube, Gmail, Maps, and Discover — simultaneously. You provide creative assets and audience signals; Google’s AI decides where, when, and to whom to show ads.
Performance Max is the most significant change to Google Ads campaign structure in years — and it generates more debate among South African advertisers than any other campaign type. Some accounts see transformational results; others see budget wasted with limited transparency. This guide explains what PMax is, how it works, and when South African businesses should use it. Related: Google Ads campaign types explained.
What is Performance Max?
Performance Max (PMax) is Google’s all-in-one, AI-optimised campaign type launched in 2021 and expanded globally through 2022-2023. A single Performance Max campaign can place ads across Google Search, Google Display Network, YouTube, Gmail, Google Maps, and the Google Discover feed. Google’s machine learning algorithms decide which channel, ad format, audience, and creative combination to use for each individual impression — autonomously, in real time.
Unlike traditional campaign types where you choose keywords, audiences, and bid strategies, PMax uses ‘asset groups’ (collections of images, videos, headlines, and descriptions) and ‘audience signals’ (suggested audiences you think will convert, which Google uses as starting signals but does not restrict to). The algorithm then optimises across channels and creative combinations to maximise conversions or conversion value.
How Performance Max Differs From Other Campaign Types
- Coverage: PMax covers all channels in one campaign vs separate campaigns per channel type
- Automation: Google makes most placement, audience, and creative decisions autonomously
- Reporting: Less granular than traditional campaigns — limited keyword-level or placement-level data
- Asset variety: Requires images, headlines, descriptions, and ideally videos — more creative input than Search campaigns
- Data requirement: Performs best with 30+ monthly conversions to optimise toward
When to Use Performance Max
- Your account has 30+ monthly conversions and clear conversion tracking in place
- You want to extend reach beyond Search into Display, YouTube, and Discovery
- You run an e-commerce store and want Google to automatically promote products across all surfaces
- You have sufficient creative assets (quality images and optionally video) to provide Google’s AI with material to work with
When NOT to Use Performance Max
- New accounts with no conversion history — PMax needs data to work; without it, the algorithm makes uninformed decisions
- When you need granular keyword control — PMax does not let you see or control which search queries trigger your ads
- When budget is very limited (under R5,000/month) — PMax’s learning period requires consistent spend to accumulate data
- When your conversions are soft signals (page views, time on site) rather than real business outcomes
PMax for South African Businesses: Practical Advice
For South African service businesses with established Search campaigns and 30+ monthly leads, adding a PMax campaign alongside existing Search campaigns often increases lead volume. However, watch for search cannibalisation — PMax may serve ads for branded and high-performing generic terms that your Search campaigns already cover. Use brand exclusions and search theme lists to guide PMax toward incremental reach rather than duplicating existing Search performance.
Google’s Performance Max documentation provides detailed guidance on asset group setup, audience signal configuration, and the reporting available within PMax campaigns.
Frequently Asked Questions
Does Performance Max replace Search campaigns?
No — Performance Max does not replace Search campaigns. Google still recommends running Search campaigns alongside PMax. PMax may serve some search ads, but it cannot be given the same level of keyword control as a dedicated Search campaign. Most South African advertisers run both: Search campaigns for high-priority keywords with full control, and PMax for broader reach and multi-channel optimisation.
How do I see which keywords PMax is bidding on?
PMax reporting is deliberately less granular than traditional campaign types. You can see a ‘Search terms’ report showing the search categories PMax is targeting, but not individual keyword-level data. Google’s stated reason is that granular keyword reporting would allow advertisers to over-control the algorithm in ways that reduce its effectiveness. This lack of transparency is the most common criticism of PMax from experienced practitioners.
What are asset groups in Performance Max?
Asset groups are PMax’s equivalent of ad groups. Each asset group contains a collection of headlines (up to 5), long headlines (up to 5), descriptions (up to 5), images (up to 20), logos (up to 5), and optionally videos (up to 5). Google creates ad combinations from these assets and tests them across channels. You can have multiple asset groups per campaign to test different creative angles or segment different product/service categories.
Can I exclude brand keywords from Performance Max?
Yes — brand exclusions are available for Performance Max campaigns in Google Ads. Go to your campaign settings and add brand exclusions to prevent PMax from competing with your existing Brand Search campaigns for your own company name. This is important to prevent budget duplication and maintain the superior control of dedicated brand campaigns.
How long does Performance Max take to optimise?
PMax has a learning period of approximately 6 weeks during which performance may be inconsistent as the algorithm experiments across channels and creative combinations. Avoid making significant campaign changes during the learning period, as each change resets the learning process. After the initial learning period, performance should stabilise and typically improves as more conversion data accumulates.