The short answer
Performance Max runs one campaign across all Google Ads inventory, including Search, YouTube, Display, Discover, Gmail and Maps, and lets Google's AI decide where to show your ads to reach your conversion goal. For a practice, it works best as an add-on to a keyword Search campaign, after you can track calls and appointment requests reliably. Give it your own assets for one service at a time, use only predefined Google audiences as signals because health ads cannot use your own patient or visitor lists, keep your exact match Search keywords running, and judge it on cost per booked patient from your own records.
What Performance Max does
Performance Max is a goal-based campaign type. You choose the conversion actions that matter, supply text, images, logos and video, and set a budget. Google combines your assets into ads and decides in each auction where to show them across its channels. Google describes it as a way to complement keyword-based Search campaigns, not replace them.
The trade-off is control. You do not pick keywords, placements or exact audiences. You steer the campaign through the goal you give it, the assets you supply, and a set of campaign controls such as search themes, negative keywords, brand exclusions and URL settings.
Before you start: conversion goals
Performance Max bids toward whatever you tell it is a conversion. If a page view or a button click counts as a conversion, it will find cheap page views. Before you launch:
- •Count real actions only. Calls of a meaningful length, completed appointment request forms and online bookings. See our guide to setting up conversion tracking.
- •Make those the primary goals. Set softer actions, such as directions clicks, as secondary so they are reported but not optimized toward.
- •Know what a booked patient is worth to you. Ask every new patient how they found you, so you can compare ad leads with patients who actually came in.
Audience signals for health ads
Audience signals are optional hints that help the campaign learn faster. They do not limit who sees your ads: Google says Performance Max may show ads to people outside your signals when they are likely to convert.
For dental and medical practices, Google's personalized advertising policy matters more than any targeting idea. Health is one of the sensitive interest categories in that policy. Ads promoting products or services in a sensitive category cannot use advertiser-curated audiences, which include customer lists (Customer Match), your data segments such as website visitors, lookalike segments and audience expansion. Predefined Google audiences, such as in-market and affinity segments, remain available. Custom segments built around sensitive ads or landing pages are limited too: in campaigns other than Display they are not eligible to serve.
- •Do not add patient lists or website visitor lists as signals.
- •Use predefined segments that fit the service, and use search themes to describe what people search for.
- •If an ad or asset group is flagged under this policy, remove the audiences Google names rather than appealing by default.
This is a summary of how Google's ad policy describes targeting, not legal advice, and the policy changes. Our retargeting guide covers the same limits for other campaign types.
Build honest asset groups
An asset group is the set of headlines, descriptions, images, logos and videos Google mixes into ads. Build one asset group per service, such as implants or emergency visits, so the ads and landing page match what the person is looking for.
- •Use your own photos. Real office, real team. Only show treatment results with the patient's written permission; our before and after photos guide covers how.
- •Keep claims checkable. Google's misrepresentation policy does not allow unreliable claims or manipulated media. Skip superlatives and anything you cannot back up.
- •Review generated assets. With text customization and Final URL expansion turned on, Google can write extra headlines from your site and send people to other pages. Google notes you remain responsible for those pages and assets, so review them, exclude pages that should not receive ad traffic, or turn the settings off.
Running it alongside Search
Keep your keyword Search campaign. When a search matches one of your exact match keywords, Google gives that Search campaign priority over Performance Max. Search themes in Performance Max are treated like phrase and broad match keywords. Add your practice name as a brand exclusion if you want brand searches to stay in a dedicated campaign, and add negative keywords for searches you never want, such as jobs or schools.
Bidding and budget
Performance Max bids with Smart Bidding toward your conversion goals. You can add an optional target cost per acquisition (or a return on ad spend target if you use conversion values). Base any target on what you can afford per booked patient, not on a number from someone else's market.
During setup, Google shows budget recommendations at low, medium and high levels with forecasts. Like other campaigns, the budget is an average daily amount: some days spend more, but the monthly charge stays within Google's limit. Our guide on how much to spend on ads each month explains how to set a test budget from your own numbers.
Measure and improve
- •Respect the Learning status. After launch or a big change, the bid strategy shows Learning. Avoid large edits to budget, targets or goals until it finishes.
- •Check channel performance and placements. These reports show how much of the spend went to search, YouTube, display and other surfaces.
- •Replace weak assets. Use asset reporting to swap low performers for new versions, a few at a time.
- •Judge on booked patients. Compare cost per booked patient with your Search campaign from your own records, and move budget toward the one that wins.
When to wait
Hold off on Performance Max if your conversion tracking is not reliable, if you cannot supply real photos and copy for the service, or if a well-structured Search campaign has not yet shown which services and searches bring patients. In those cases, Search gives you clearer data for the same budget.
If you want help planning a Google Ads setup for your practice, see our Google Ads management service.
Sources
Google Ads features and policies change often, so check them for current wording.
- •Google Ads Help: About Performance Max campaigns
- •Google Ads Help: About audience signals for Performance Max campaigns
- •Google Advertising Policies Help: Restricted targeting in Personalized advertising
- •Google Ads Help: About bid strategy statuses
- •Google Ads Help: About average daily budgets
- •Google Advertising Policies Help: Misrepresentation
Frequently Asked Questions
Is Performance Max worth it for a small dental practice?
It can be, once a keyword Search campaign is running with reliable conversion tracking. Performance Max optimizes toward the conversions you tell it to count, so it needs accurate tracking of real actions such as calls and appointment requests. If you cannot yet tell which leads became booked patients, start with Search, fix tracking, and add Performance Max later as a test with its own budget.
Can I upload my patient list as an audience signal?
Usually not for a health care practice. Google's personalized advertising policy treats health as a sensitive interest category, and ads in that category cannot use advertiser-curated audiences such as customer lists, website visitor lists, lookalike segments or audience expansion. Predefined Google audiences such as in-market and affinity segments are still allowed. This is how Google's policy describes it, not legal advice.
Will Performance Max take traffic from my Search campaign?
When a search matches an exact match keyword in one of your Search campaigns, Google gives the Search campaign priority. Search themes in Performance Max carry the same priority as phrase and broad match keywords. Add your practice name as a brand exclusion or keep a separate brand Search campaign if you want clean reporting on brand searches.
What should go into a Performance Max asset group?
Your own headlines and descriptions for one service, real photos of your office and team, your logo, and if possible a short video. Keep every claim true and checkable, and only show treatment results with the patient's written permission. Review any text Google generates from your landing page before it runs.
How long should I wait before judging results?
Watch the bid strategy status rather than a fixed number of days. While it shows Learning, results swing, so avoid large changes to budget, targets or conversion goals. After it leaves Learning, judge the campaign on cost per booked patient from your own records, not on clicks or form fills alone.
Can I see where my Performance Max ads ran?
Yes, more than you used to. Google Ads offers channel performance reporting, placement reports, asset group reporting and asset-level metrics for Performance Max. Use them to check whether spend is going to search, video or display, and to find weak assets to replace.