When calling update_ad_group with max_cpc on a campaign using Maximize Clicks (TARGET_SPEND), the tool returns: "max_cpc requires an ad group in a MANUAL_CPC campaign". The refusal may be intentional — ad group CPC bids are completely ignored by Maximize Clicks per Google's own documentation (effective_cpc_bid_micros = 0, campaign ceiling is the only active constraint). But the error message implies a technical limitation rather than clarifying this. Suggested improvement: return something like "Ad group-level CPC bids have no effect in Maximize Clicks campaigns. The campaign cpc_bid_ceiling is the active constraint. No change made." Reference: https://support.google.com/google-ads/answer/6336101
When calling update_ad_group with max_cpc on a campaign using Maximize Clicks (TARGET_SPEND), the tool returns: "max_cpc requires an ad group in a MANUAL_CPC campaign". The refusal may be intentional — ad group CPC bids are completely ignored by Maximize Clicks per Google's own documentation (effective_cpc_bid_micros = 0, campaign ceiling is the only active constraint). But the error message implies a technical limitation rather than clarifying this. Suggested improvement: return something like "Ad group-level CPC bids have no effect in Maximize Clicks campaigns. The campaign cpc_bid_ceiling is the active constraint. No change made." Reference: https://support.google.com/google-ads/answer/6336101