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
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.