Performance Max is Google's all-in-one campaign type. A single budget feeds it, and Google chooses the placement each time, from the search results page to YouTube, Maps, Gmail and the wider web. You hand it your goals, your ads and some hints about who your customers are, and it goes looking for more of them.
For most businesses, the most powerful hint is their own customer list. For most medical practices, that hint is off the table. Google's health rules keep the patient list out of the service lines that need it most, and the privacy questions around uploading patient data are a reason to leave it alone even where it's allowed. So a practice has to steer Performance Max with something else, and what it's allowed to use depends on which service the campaign is selling.
Performance Max Waits Until Search Has Months of Real Bookings
Performance Max never comes first. Our rollout brings it in near the half-year mark. By then Isolation has proved which searches fill the schedule, and Exploration has had its couple of months finding the long tail. By then, the account has something Performance Max badly needs: a record of real bookings that tells Google what a patient looks like.
Launch it earlier, and the campaign spends its first months guessing, across more ad placements than anyone can watch. Launch it later, on top of a working Search account, and it has real conversions to learn from from day one. Give it a budget of its own, too, separate from the Search campaigns. A Performance Max campaign that shares money with Search can pull spend away from the searches that already book, and the practice ends up paying more for patients it was getting anyway.
The build follows the same rules as everything before it. Set the goal to conversions, the bookings Chapter 1 defined. Don't add a target cost per booking at launch; let the campaign learn first and add the target later, using its own numbers, the way Chapter 7 did for Exploration. And set location to Presence, as Chapter 9 did for Search, so the campaign spends on people who can actually come in.
Google Sorts Your Service Pages Into Sensitive and Everything Else
Here's the part that makes healthcare different. Google's personalized advertising rules put health on a short list of sensitive interest categories. Its definition covers physical and mental health conditions, chronic conditions and their treatments, surgical procedures, and anything involving genital, bowel or urinary health, among others.
Google doesn't publish a list of specialties, so each practice has to read its own service pages against that definition. Here's our reading:
- Probably not sensitive: a primary care page inviting new patients, an urgent care page listing hours and walk-in availability. Neither is about a condition or a procedure.
- Sensitive: colonoscopy, orthopedic surgery, joint injections, psychiatry and therapy, fertility treatment, diabetes or arthritis management, anything in urology or gynecology.
- Unclear: physical therapy for a one-time injury, which isn't a chronic condition or a surgery.
When a page is unclear, treat it as sensitive. Guessing wrong in the other direction means an audience signal that quietly never serves, and you may not notice for weeks. Guessing cautiously just means steering with Google's own segments a little longer.
For a campaign selling a sensitive service, four audience tools are simply unavailable: uploaded contact lists (Customer Match), segments built from your own data such as past site visitors, audience expansion, and lookalikes. In plain terms, you can't upload your patient list or your colonoscopy page's visitors and ask Google to find more people like them.
Most practices couldn't use Customer Match for targeting anyway. Google requires 90 days of account history and more than $50,000 in lifetime spend before a list can be used to target anyone. And uploading patient names, emails or phone numbers to an ad platform raises the HIPAA questions Chapter 1 warned about, which belong with the practice's compliance advisor before anyone clicks upload.
A Custom Audience Can Steer Urgent Care. Colonoscopy Gets Google's Own Segments.
Performance Max takes audience signals: hints about who's likely to convert. They're suggestions, not rules. Google reserves the right to reach people beyond the signals whenever it judges they're likely to book. So a signal points the campaign in a direction. It doesn't fence it in.
For a non-sensitive service line, the strongest signal a practice can build is a custom segment. Google's custom segments let you describe your ideal audience with keywords, website addresses and apps. The method this guide teaches builds them from two places: the searches that actually booked in Isolation, and up to 20 competitor websites, meaning people who browse sites similar to the other urgent care centers in town. That's a sharp description of an urgent care patient, and none of it comes from patient data. In our example market, that means searches like "urgent care near me" and "walk in clinic near me" from Chapter 2's research, plus the websites of the urgent care centers a patient might otherwise choose.
The catch is in a footnote on Google's health policy page. Custom segments that use sensitive ads or point to sensitive landing pages will serve only in Display campaigns, and only to non-sensitive audiences or based on the page's content. Every other campaign type using them won't be eligible to serve at all. So the colonoscopy campaign can't lean on a custom segment either.
On a non-sensitive page, Google's policy would allow a website visitor list or a lookalike segment. We leave them out there too. A list of people who visited a medical practice's website is still close to health data, and Chapter 1 kept patient information away from the ad platforms for good reason.
A sensitive line is left with the segments Google builds itself. In-market and affinity audiences remain allowed on health content, and search themes drawn from the Search account's booked searches add a second hint. That's thinner steering, and it's one more reason a sensitive line should keep most of its budget in Search, where keyword targeting works exactly as it always has.
This split is why each service line gets its own Performance Max campaign, just as Chapter 7 gave each its own Search campaign. An urgent care campaign with a sharp custom segment and a colonoscopy campaign running on Google's own segments are two different machines. Bundling them into one campaign leaves Google to sort it out, usually in favor of whichever line books cheapest.
Brand Exclusions and URL Rules Keep It Off the Searches and Pages You Already Own
Two settings keep Performance Max from taking credit for work the rest of the account already does.
Brand exclusions. Unchecked, the campaign will chase people typing the practice name or a doctor's name into Google and then claim those appointments as its own work. Those patients were already looking for you, and the brand campaign from Chapter 6 covers them for far less. Google's brand exclusions stop Performance Max from serving on searches tied to a brand you list. Add the practice name and each doctor's name. If they aren't in Google's brand library, you can request to add them.
Final URL expansion. Google turns this on by default for Performance Max, and it lets the campaign send traffic to any page on your site that hasn't been excluded. For a practice, that can mean ads leading to the patient portal login, the pay-my-bill page, the careers page or an intake form built for existing patients. Exclude every page that isn't a place a new patient should land, or turn the feature off and name the pages yourself. Once the campaign is running, read its search terms report every month. Any search the Search account should own, especially your own name or a keyword Isolation already wins, is a sign that an exclusion is missing.
Stock Photos of Smiling Doctors Teach Performance Max Nothing About Your Practice
Every Performance Max ad is assembled on the fly from the raw material in its asset groups: the text lines, pictures, logo and any video. The quality of those pieces decides the quality of every ad it assembles.
Start with the headlines that already won. Chapter 8's Search ads have months of data by now, so bring over the lines that earned clicks and bookings, the patient phrases from your reviews and the access promise if it's still true. Skip the AI-generated text and images Google offers to create. In healthcare, every line and every picture should be one the practice chose and checked. Within each service line's campaign, build one asset group per service, each pointing to that service's page from Chapter 4, so knee headlines never end up in an ad that sends someone to the shoulder page.
Watch the tone as well. Google's personalized advertising policy also lists "imposing negativity" as a sensitive category, with suggesting bad outcomes if people don't act as its example. A cardiology asset that says "Don't wait for a heart attack" is exactly that kind of line.
Use real photos of the real office, the real front desk and the real doctors, with permission from anyone who appears in them. A stock photo of a smiling stranger in a white coat looks like every other practice's ad and tells a patient nothing about yours. Supply a real video, even a simple one filmed on a phone of a doctor explaining what a first visit is like. Skip it and Google stitches one together from your still images, a slideshow few practices would ever approve.
Finally, add search themes: the searches that booked in Isolation and Exploration, written in patients' words. If Google flags a theme, especially a health-related "near me" search, drop it rather than fight it. The themes are hints, like everything else in Performance Max, and the Search account is still doing the heavy lifting on those searches.
Our specialty guides cover Performance Max in their own fields. The dermatology guide covers giving Performance Max one goal per campaign. The plastic surgery guide covers Performance Max for a plastic surgery practice. The optometry guide covers building an audience from optical chain websites.
Next: YouTube Reaches Patients Before They Search
Performance Max finds patients who are close to booking. The next campaign type reaches them earlier. Chapter 11 covers Demand Gen on YouTube for a medical practice, and what Google's health rules leave it to work with.
Catch up on Chapter 9 on the settings to change at launch, or see every chapter on the guide home for Google Ads for Healthcare. When a practice hires us for Google Ads management, Performance Max is a month-six conversation, never a launch-day one.
