When does Performance Max work well?
Performance Max works well when conversion tracking is reliable, there is enough conversion data and you have strong assets. It's usually in addition to targeted Google Ads search campaigns, not the first campaign in an empty account.
What do you need for PMax?
Performance Max needs good input in order not to distribute the budget blindly.
| Necessary | Why |
|---|---|
| Conversion tracking | Gives the algorithm a reliable target |
| Value per conversion | Helps focus on quality, not just numbers |
| Assets | Text, image and video determine how broadly usable you are |
| Exclusions | Limit brand traffic, bad placements and irrelevant searches |
| Landing pages | Ensure that extra reach also generates sales or leads |
When should you not use PMax?
Do not use PMax if tracking is unreliable, you have few conversions or you first want to know which keywords exactly work. In that phase, search campaigns provide more control and clearer learning data.
In practice
Performance Max can claim easy conversions that you already got anyway, for example via your brand name. That is why we not only assess reported conversions, but also what PMax really adds.
How do you prevent PMax from becoming a black box?
Ensure clear conversion goals, good asset groups, exclusions, strong landing pages and regular monitoring of search term and channel insights. Automate where possible, but continue to focus on lead quality and margin.
How does PMax fit into your strategy?
See Performance Max as an accelerator on top of a healthy basis. Combine it with search campaigns, monitor your what Google Ads costs and connect it to your broader lead generation. It's part of your complete Google Ads approach.
How do you check what Performance Max is doing?
Only partly, and that is the campaign type's defining property. You see less than in a search campaign: no full search terms per placement and no free choice over where your ads appear. These checks are therefore the minimum before you let a PMax campaign run.
| Check | Why |
|---|---|
| Exclude brand traffic | Otherwise PMax claims conversions you were getting anyway |
| Set conversion values | Without value the algorithm optimises for counts |
| Provide audience signals | It gives the system a starting point instead of a guess |
| Read the search category report | The only view on the demand you served |
| Review placements | To exclude irrelevant apps and sites |
When does PMax cannibalise your other campaigns?
When your brand name is not excluded. PMax then picks up the cheapest conversions, namely the people who were already looking for you, and appears to outperform your search campaigns. The report is correct; the conclusion is not.
The test is simple: compare your total number of enquiries before and after PMax started, not just the figures inside the campaign. If the total does not rise while PMax shows conversions, you are moving budget around instead of winning demand.