Performance Max campaign management – set the foundations, then let it learn

Four foundations of Performance Max campaign management

In a Performance Max campaign, Google's AI chooses most placements and bids. You control fewer levers than in classic campaigns, and every one of them becomes training data. Start with these four.

• Conversion tracking: set only the outcomes you truly want – purchases, inquiries, bookings – as primary conversions. Counting page views or clicks teaches the AI to chase low-value actions
• Assets: headlines, descriptions, images, logos and video that state your strengths in concrete terms
• Feed: for online stores, the product data in Google Merchant Center. Accurate titles, prices, stock and images shape where and how you appear
• Landing pages: can a visitor from the ad move straight to a purchase or an inquiry?

Fixing tracking later restarts learning, so check that GA4 and your Google Ads conversion tags fire correctly before the campaign goes live.

When Performance Max is not delivering

"We switched to PMax and only the cost went up" is a familiar story. The cause is usually one of these:

• A large share of budget goes to searches for your own brand – people who would have come anyway
• Conversion goals are too broad, so the AI learns from actions that never lead to sales
• All products sit in one asset group and the message is blurred
• Feed titles are short and miss the words people actually search for
• Budgets and targets change every few days, so learning never settles
• The landing page is hard to use on a phone and visitors drop before checkout

Start with the campaign's Insights tab and the channel performance report to see which search terms and channels take your spend. For reading return on ad spend correctly, see ROAS improvement.

Setting up asset groups and the feed

Filling in the campaign form is enough to start serving. To get stable results, give each setting a clear purpose.

• Goal and bidding: start with Maximize conversion value for online sales or Maximize conversions for leads, then add a target ROAS or CPA once data builds up
• Asset group structure: split by product category, price range or margin – anywhere the message or target differs – and make sure headlines and images match that group
• Asset volume: fill headlines and descriptions close to the limit, add landscape, square and portrait images, and a short video if you can. Without one, Google generates a video automatically, so check it fits your brand
• Audience signals: add customer lists, site visitors and search terms. They are hints for the AI and do not restrict who sees the ads
• Search themes: add phrases that show what you are best at to guide learning on Search
• Feed optimization: put material, size and use case into product titles, and keep price and stock in sync with your site

For Merchant Center preparation and how products appear in Shopping slots, see Google Shopping ads. After setup, the usual practice is to leave the campaign largely untouched for a few weeks while it learns.

Negative keywords, exclusions and budget control

Performance Max is highly automated, yet it gives you several ways to decide where your ads should not run. These are your main tools for cutting wasted spend.

• Negative keywords: exclude terms like "free", "jobs", "used" or "DIY" that rarely convert. Google keeps expanding these controls, including at campaign level, so check what your account offers today
• Brand exclusions: if a separate Search campaign covers your brand name, exclude it from PMax to avoid paying twice
• Final URL expansion: exclude blog or news URLs that rarely convert, or turn expansion off
• Budget changes: adjust in gradual steps and judge weekend or sale swings over a full month
• New customer acquisition: combine the new customer setting with your customer lists if you want less spend on existing buyers

Review the search terms report weekly and add non-converting terms to your exclusion list. For the bigger picture of paid channels for online stores, see e-commerce advertising.

How UNANOBO manages Performance Max: ads and landing pages together

Performance Max results depend on both the campaign and the page people land on. UNANOBO handles conversion tags, Merchant Center and feed cleanup, asset group design, exclusions and budget pacing – together with improving the pages the ads point to.

We begin with a free demo: an improved product or landing page built from your current site or store, which you can click through on a computer and phone. The process is free demo, feedback, launch, growth, with the founder as your single contact throughout. Everything runs by message, in Japanese or English, and your Google Ads and Merchant Center accounts stay in your name.