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# CampaignUpdate.BidStrategy

The request body for updating a bid strategy on an ad group or campaign.

```
object CampaignUpdate.BidStrategy
```

## Discussion

To change a campaign’s bid strategy after creation, use this object. The `bidStrategyType` and `bidStrategyGoal` fields must be sent together and matched per the pairings in `BidStrategy`.

See [`BidStrategyUpdate`](/documentation/Apple-Ads-Platform-API/BidStrategyUpdate) for the full field reference.

---

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