Primary Conversion Dilution

Google Ads supports multiple Primary actions per conversion goal, and account-default goals can include several Primary actions across categories. The platform optimizes against the sum of value across all Primary actions in a campaign goal. That is sound when the actions represent distinct, comparably weighted outcomes. It breaks down when the Primary list expands to include every plausible business outcome under one campaign. A common scenario: an account starts with Purchase as Primary, then adds Lead Form Submit as Primary for a different campaign, then adds Demo Request, then adds Phone Call, then adds Email Signup. By month six there are six or seven Primary actions all feeding the same Smart Bidding strategies. The bidder has no clean way to weight them. The conversion value per cost calculation rolls them all together. Campaigns that should optimize toward purchases pull volume from cheaper Lead Form Submits because they look better on a count basis. The fix is not to delete actions, it is to scope them. Each campaign should target the Primary actions that match its business goal. Cross-campaign Primary sprawl is the dilution.

1. Open Tools and Settings, Goals. Review which actions are Primary in the account default goal.
2. For each campaign, set a campaign-level conversion goal that targets only the Primary actions relevant to that campaign (Purchase campaigns target Purchase, Lead campaigns target Lead Form Submit, etc). This overrides the account default.
3. If multiple macro actions genuinely need to coexist at the account level, ensure value-based bidding is in use so the optimizer weights them by revenue rather than count.
4. Demote macro actions that are not actively used for optimization to Secondary.
5. Re-audit after the next quarter to confirm Primary count stays below four per campaign goal.