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In Gender demographics, you can have a gender excluded (see Google Ads screenshot), and so if you apply any bid adjustment to that, you’ll get an error.

You can filter out these excluded groups by using the attribute "isNegative" = "No", to make sure you do not work on the excluded group.

Note: Limits of more than 900% and less than -90% are not suggested.

If you set a device bid adjustment at the campaign level and at the ad group level in a single campaign, the ad group device bid adjustment is used when determining your bid. However, if the campaign device bid adjustment is -100%, then the ad group device bid adjustment isn't used.

The system shows the effective device bid adjustment for ad group devices, whether the source is a campaign or ad group, whichever is applicable.

You can use "Desktop bid adj. level" etc. attributes to know the source of bid adjustment.

If both campaign and ad group devices are "- -", the bid adj is treated as 0.

Note: Limits of more than 900% and less than -90% are not suggested, -100% is the exception.

Note: The Rule Engine doesn't show TV Screens in devices for bid adjustments as the API doesn't support it as of now.

Google announced that the campaign_criterion_simulation report has been deprecated since July 10, 2023. As it is not returning any response from the API anymore, Optmyzr is not able to make intelligent suggestions anymore in the Device Bid Adjustment tool. You can use Rule engine to optimize your campaigns on manual bidding, click here to get started.