Performance Max Campaign Setup: The Guardrails I Use Before Launch

Last updated: 7 November 2026

A Performance Max campaign can reach buyers that keywords alone would miss, but it will also spend on traffic you never wanted if you leave it open. I set guardrails before launch and read the results campaign by campaign, not as one blended number. This guide covers both, with a new jewelry store’s account as the worked example.

Quick Answer: How should you set up a Performance Max campaign?

Launch a Performance Max campaign only after conversion tracking works. Before it spends, add account-level negatives in phrase and exact match, exclude weak placements, and exclude blog and other pages that do not sell. Split campaigns only where budgets must stay separate. Start on Maximize conversion value, then add a target ROAS once returns hold steady.

These are the guardrails I set before launch, and where each one lives in Google Ads.

How does a Performance Max campaign work?

A Performance Max campaign is a goal-based campaign that reaches all Google Ads inventory from one place. Google’s overview lists YouTube, Display, Search, Discover, Gmail and Maps. You give it a conversion goal, assets and audience signals, and Google’s AI decides where and when to show your ads.

For a store, the product feed does much of the work. Listings come from Merchant Center, and listing groups decide which products each asset group can show. Text, image and video assets fill the other formats.

Two settings shape where the traffic lands and which searches it takes. Final URL expansion is on by default, which lets Google swap your final URL for another page on your domain. And Search campaigns with an exact match keyword are prioritized over Performance Max when the query matches.

When should Performance Max replace broad match?

Performance Max should take over the broad job once the account has conversion data. Before that, I keep Search on exact match for roughly the first 15 days. Exact match costs more per click, but the traffic matches what the business sells.

Broad match only works once an account already has conversion data to guide it. So I hold broad back in Search. Performance Max reaches the wider audience, while exact match Search keeps the core terms.

Google’s serving order makes this structure work. Search themes in Performance Max carry the same priority as phrase and broad match keywords, while exact match Search keywords win when they match the query. Your proven terms stay in Search, and Performance Max explores around them.

I go deeper on that trade-off in my post on broad match in Google Ads. It covers when broad starts to make sense and what has to be in place first.

Which guardrails should you set before launching Performance Max?

Set three guardrails before launch: account-level negatives in phrase and exact match, placement exclusions, and URL exclusions for pages that do not sell. Then confirm that conversion tracking counts each sale once, with its value. All of this happens before the campaign spends anything.

Why use account-level negatives instead of campaign negatives?

Account-level negatives protect every campaign at once, so a miss at campaign level does not matter. Google’s help page says they apply to Search and Shopping inventory in Search, Performance Max, App, Shopping, Smart and Local campaigns. Each account can hold up to 1,000 of them.

I build the list up front in phrase and exact match. Negative keywords do not match close variants, so add the plurals and misspellings you want blocked. Google also allows campaign-level negatives in Performance Max, up to 10,000 per campaign, but they cover Search and Shopping inventory only.

I review the search terms report regularly and block waste at account level. The full routine is in my guide to the Google Ads search terms report.

How do you stop Performance Max sending traffic to blog pages?

Use URL exclusions in the campaign settings. Google’s URL exclusion page explains how to stop traffic going to specific pages, or to whole sections through rules, and uses a careers page as an example. I exclude the blog and other non-selling URLs, so traffic only lands on pages that convert.

You can also turn Final URL expansion off. With it off, Google says the campaign only sends users to the URLs in your page feed and asset groups. One limit to know: your campaign’s own final URL cannot be excluded this way.

How do you keep Performance Max off weak placements?

Use account-level placement exclusions. Google’s brand suitability guide says Performance Max respects all account-level and manager-level placement exclusions, which cover Display, Search Partners and video. Placement exclusion lists can only be created in manager accounts.

Content suitability settings sit at account level too, with inventory types for YouTube, Display and video partners. If you want branded searches kept out of Performance Max, Google recommends campaign-level brand exclusions. Unlike negatives, they also block clear misspellings and brand names written in other scripts.

Here is the pre-launch checklist I run on every Performance Max campaign.

1. Conversion tracking counts each sale once, with order value, and only purchases are primary.
2. Account-level negatives are in place, in phrase and exact match.
3. Irrelevant placements are excluded at account level.
4. Blog and other non-selling URLs are excluded, or Final URL expansion is off.
5. Listing groups include only the products each campaign should sell.

Should you run one Performance Max campaign or several?

Run one campaign with several asset groups, unless part of the catalog needs its own budget or target. Google’s Performance Max guidance says to consolidate where you can and to avoid separate campaigns unless they need different budgets, ROAS or CPA targets, or settings. MiKi Jewellery met that test.

Each of MiKi’s five Performance Max campaigns carries one collection or product type, and listing groups exclude everything else. In practice, each campaign excludes 92 to 97 percent of the catalog, according to the case study. Each campaign has its own budget.

The reason was control. A best-selling collection cannot use up the money meant for a newer one, and return on spend shows by collection. When results differ by collection, separate budgets let spend shift toward the stronger ones.

How do listing groups split the catalog?

Listing groups sit inside each asset group and decide which products it can show. Google’s listing group guide lets you subdivide by category, brand, item ID and custom labels, then exclude any branch you do not want. You can create up to 5 custom labels in your product data.

Custom labels are a good home for margin data. MiKi’s case study lists custom labels by margin tier as a next step, so spend can follow profit rather than revenue alone.

What happened in the MiKi Jewellery Performance Max account?

Across 47 days, the five campaigns returned 7.81 in conversion value per cost on A$2.88k of spend, according to the MiKi Jewellery case study. The account was brand new, with no spend before 5 September 2026. MiKi is an independent jewelry brand selling through Shopify from Busselton, Western Australia.

Here is how the campaign view looked when the account was read on 21 October 2026, across all five enabled campaigns.

Source: MiKi Jewellery Google Ads case study, Hustle Marketers (all five enabled campaigns, read 21 October 2026).

These numbers belong to one store over a short window. They show what this structure did for that business, and they are not a forecast for any other account.

What did lost impression share tell me?

It told me to fix rank before adding budget. Google defines lost impression share to rank as time your ads did not show because of poor Ad Rank, and lost share to budget as time lost to insufficient budget. With about 68% lost to rank and about 14% to budget, per the case study, a bigger budget would not close the main gap.

So product data and assets come first. The case study names them as the priorities before any budget increase. Budget comes after that work, once the campaign can compete in the auctions it already enters.

What does “limited by policy” mean for an asset group?

It means the assets can still serve, but not everywhere or every time. Google describes a limited status as one for ads and products that comply with policy but are limited in where and when they can show. In MiKi’s earrings campaign, every asset group was limited, while the other four campaigns were unaffected, per the case study. The fix is to edit the flagged assets or appeal.

Here the campaign split paid off a second time. Because earrings run in their own campaign, the policy limit stayed inside that one campaign instead of touching the whole catalog.

Here is a bridal boutique client talking about working with my team.

How should you bid in a Performance Max campaign?

Start on Maximize conversion value with no target, then add a target ROAS once returns hold steady. My rule is about 30 days of stable ROAS before I set a target. After that, I push the target up by 15 to 20 percent.

I judge every target against break-even ROAS, which is 1 divided by profit margin. A target set below break-even can grow sales while losing money on each one. I never promise a client a ROAS figure, especially on campaigns still in learning.

Learning is shorter than many people think, but stable results take longer. Google says the learning period never lasts more than 7 days, while performance can take 1 to 2 conversion cycles to stabilize. Budget and target changes do not trigger a new learning status, but a new or reactivated bid strategy does.

On small accounts, avoid stacking changes. Google advises against multiple target changes within one conversion cycle unless there is a clear business need. Make one change, wait a cycle, then read the result.

Here a skincare brand client talks about running Google Ads and Meta Ads with my team.

How do you check what a Performance Max campaign is doing?

Start with the search terms report, then look at channel and placement data. The Performance Max search terms report sits under Insights and reports in the campaign menu. It shows the searches that triggered your ads, and you can block poor ones as negatives.

Google’s Performance Max FAQ says reporting now covers channel allocation, search terms, URL traffic and placements. Use URL traffic to confirm your exclusions are holding. Use placements to spot sites worth excluding at account level.

For a store, also compare return by campaign each month, check policy status and see whether budget or rank limits each campaign. That is the monthly routine on MiKi’s account, per the case study.

If you sell on Shopify, my guide to Shopify Google Ads covers the app, the feed and the tracking that sit underneath this campaign. Those parts decide how well Performance Max can learn.

FAQs

Can you add negative keywords to a Performance Max campaign?

Yes. Performance Max respects both campaign-level and account-level negative keywords, and Google allows up to 10,000 at campaign level. They apply to Search and Shopping inventory only. I prefer account-level negatives in phrase and exact match, because they protect every campaign even when a campaign list misses a term.

Does Performance Max replace Search campaigns?

No. Google prioritizes Search campaigns with an exact match keyword over Performance Max when the query matches. Search themes in Performance Max carry the same priority as phrase and broad match keywords. I keep proven terms in exact match Search and let Performance Max handle broad reach once there is conversion data.

How do you stop Performance Max from sending traffic to your blog?

Add URL exclusions in the campaign settings, or turn off Final URL expansion. Final URL expansion is on by default, so Google can send traffic to any page on your domain that you have not excluded. With it off, traffic only goes to the URLs in your page feed and asset groups.

How long is the Performance Max learning period?

Google says the learning period never lasts more than 7 days, but performance can take 1 to 2 conversion cycles to stabilize. A new or reactivated bid strategy starts learning again, while budget and target changes do not. Even so, avoid several target changes inside one conversion cycle.

Can Performance Max focus on new customers?

Yes. Google offers a new customer acquisition goal with a new customer value mode. When a client wants new customers, I do not put live campaigns back into learning. I leave them as they are and test new customer acquisition in a separate campaign that excludes the existing customer list.

Should brand searches run through Performance Max?

That is your choice, and Google gives you a tool for it. Google says campaign-level brand exclusions are the better option for blocking brand traffic in Performance Max. Unlike negative keywords, they also block clear misspellings and brand names in other scripts. Exact match brand keywords in Search still take priority when they match.

What should you do before your next Performance Max launch?

Check tracking, set the guardrails, decide your campaign split and agree how you will judge results, all before the campaign spends. If you want a specialist to check that work, I will audit your account for free.

I have managed Google Ads since 2013 and hold Top Rated Plus status on Upwork. My fee is $600 to $800 per platform a month, month to month with no lock-in. You own every account, and ad spend is paid to Google separately.

You can hire a freelance Google Ads specialist through this site, or read more guides on the Google Ads blog. Each guide comes from the same kind of account work you read about here.

How this post was written: drawn from Ishant Sharma’s own account work and the published case studies linked above, researched against current Google Ads documentation, drafted with AI assistance and checked against the sources before publishing.