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# AdGroupUpdate.BidStrategy

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

```
object AdGroupUpdate.BidStrategy
```

## Discussion

Ad groups under an auto-bidding campaign (`bidStrategyType` of `MAX_CONVERSIONS` or `MAX_ENGAGEMENTS`) inherit their bid strategy from the campaign. For other ad groups, you can change both `bidStrategyType` and `bidStrategyGoal`, as long as you send them together and match one of these pairings: `MANUAL_CPT`↔`TAP`, `MANUAL_CPM`↔`IMPRESSION`, `MAX_CONVERSIONS`↔`INSTALL`, `MAX_ENGAGEMENTS`↔`TAP`.

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

---

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