1) How to get the Performance Max campaign placements data
Performance Max campaign placements data in Google Ads interface (limited metrics available)
Although PMax campaigns only allow for placements exclusion at the Account level, it is always a good idea to exclude placements that are not a good fit for your business and that subtly drain your budget.
To find those websites, apps, YouTube videos/channels,..., where your ads were shown you need to know that for Performance Max campaigns this data is located in a different section than the rest of campaign types.
If you try to see this data from the usual “Placement” report under the "Content" section in Google Ads interface, you will only see placements concerning other campaigns that are not PMax campaigns.
In order to see the data concernig PMax campaigns you need to go to the Performance Max Placements report. To get this report go to the “Predefined Reports” section and select “Performance Max Placements report”.
Once you select the "Performance Max campaigns placements" report you will find the following table:
As you will notice, Google Ads does not provide much information...basically just the placements impressions. If you try to add some metrics like Clicks you will find out that they are not available in this report:
Performance Max campaign placements data in Dolnai tool (all metrics available)
Below you can see an expanded view of the Dolnai Tool for PMax campaign placements with all the metrics available:
With all the above available information you can get a better understanding of where your ads showed and the performance along all those placements.
Currently it is only possible to exclude placements at the Account-level but, as mentioned at the beginning of this post, it is always a good idea to exclude unwanted placements even if it is at the account level.
2) How to Exclude Placements in PMax Campaigns (account-level exclusion)
Once you have detected a number of placements that you wish to exclude from your account, go to Content > Placements > Placement Exclusion
There you just have to add those YouTube channles/videos, websites, apps or app categories that you wish to exclude.
Remember that you can only edit account-level placement exclusions for Performance Max campaigns
Just click "Save"...and that's it. From now on those placements will be excluded from your account placements.
Performance Max placement report shows you where your ads showed. This report tells you how many impressions your ads received among the different websites, apps, YouTube channels/videos,...they were showed.