Page Summary
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Bid strategies can only be set at the campaign level, and campaign-level bid strategies that don't support manual bids will ignore them at the keyword level.
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The target_roas field can be overridden at the ad group level, but other fields of the bidding scheme cannot be.
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The target_cpa_micros field can be overridden at the ad group level, but other fields of the bidding scheme cannot be.
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To remove an override for target_roas or target_cpa_micros, unset the field of the ad group in a mutate request with an empty field value and supply the path in a field mask.
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You can retrieve the effective target_roas or target_cpa_micros and their source for an ad group using specific fields.
The following overrides are available.
Override bidding strategies
A bid strategy can only be set at the campaign level. So for example, if a
campaign has already been assigned a TARGET_ROAS
strategy
, setting TARGET_CPA
fields in one of its ad groups will have no effect.
Similarly, setting bids manually will have no effect if you are using a
campaign-level bid strategy that doesn't support them. For example, if your
campaign uses TARGET_ROAS
as a standard bidding strategy, and you set max CPC
values for individual keywords in that campaign, the keyword-level bids will be
ignored without errors. If you were to switch to manual bidding, the
keyword-level bids would then take effect. Read more in the Help Center
.
Override Target ROAS at the ad group level
The target_roas
field of a TargetRoas
bidding scheme, or a MaximizeConversionValue
with its target_roas
field set,
can be overridden at the ad group level by setting the ad group's target_roas
field. The other fields of
the bidding scheme cannot be overridden.
To remove an override, unset target_roas
of the ad group by sending a mutate request with an empty field value but still
supplying the path in a field mask. Attempting to override the target_roas
field of a TargetRoas
scheme associated to a portfolio
strategy will result in an error.
You can retrieve the effective target_roas
value of an ad group with the effective_target_roas
field and
its source with the effective_target_roas_source
field.
Override Target CPA at the ad group level
The target_cpa_micros
field of a TargetCpa
bidding scheme, or a MaximizeConversions
with its target_cpa_micros
field
set, can be overridden at the ad group level by setting the ad group's target_cpa_micros
field. The other
fields of the bidding scheme cannot be overridden.
To remove an override, unset target_cpa_micros
of the ad group
by sending a mutate request with an empty field value but still supplying the
path in a field mask.
You can retrieve the effective value of target_cpa_micros
for an ad group from
the effective_target_cpa_micros
field and its source from the effective_target_cpa_source
field.
