> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/fields/latest/bidding_strategy_simulation).

[<button style="margin-top:15px">Help me build a query</button>](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy_simulation_query_builder.md.txt) [<button style="margin-top:15px">Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)</button>](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/resources/bidding_strategy_simulation.proto)

A bidding strategy simulation. Supported combinations of simulation type
and simulation modification method are detailed below respectively.

1. TARGET_CPA - UNIFORM
2. TARGET_ROAS - UNIFORM

| Attributed resources |
|---|
| [bidding_strategy](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy.md.txt) |
| [customer](https://developers.google.com/google-ads/api/fields/v24/customer.md.txt) |

Fields from the above resources may be selected along with this
resource in your SELECT and WHERE clauses. These fields **will not segment**
metrics in your `SELECT` clause.

## bidding_strategy_simulation.bidding_strategy_id

Field descriptionOutput only. Bidding strategy shared set id of the simulation.
Category`ATTRIBUTE` Data Type`INT64` Type URL`N/A` FilterableTrue SelectableTrue SortableTrue RepeatedFalse Selectable with The following fields/resources can be selected with this field:
[bidding_strategy_simulation](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy_simulation.md.txt)

## bidding_strategy_simulation.end_date

Field descriptionOutput only. Last day on which the simulation is based, in YYYY-MM-DD
format
Category`ATTRIBUTE` Data Type`DATE` Type URL`N/A` FilterableTrue SelectableTrue SortableTrue RepeatedFalse Selectable with The following fields/resources can be selected with this field:
[bidding_strategy_simulation](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy_simulation.md.txt)

## bidding_strategy_simulation.modification_method

Field descriptionOutput only. How the simulation modifies the field.
Category`ATTRIBUTE` Data Type `ENUM`
`DEFAULT``SCALING``UNIFORM``UNKNOWN``UNSPECIFIED` Type URL`google.ads.googleads.v24.enums.SimulationModificationMethodEnum.SimulationModificationMethod` FilterableTrue SelectableTrue SortableTrue RepeatedFalse Selectable with The following fields/resources can be selected with this field:
[bidding_strategy_simulation](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy_simulation.md.txt)

## bidding_strategy_simulation.resource_name

Field descriptionOutput only. The resource name of the bidding strategy simulation.
Bidding strategy simulation resource names have the form:

`customers/{customer_id}/biddingStrategySimulations/{bidding_strategy_id}~{type}~{modification_method}~{start_date}~{end_date}`
Category`ATTRIBUTE` Data Type`RESOURCE_NAME` Type URL`N/A` FilterableTrue SelectableTrue SortableFalse RepeatedFalse Selectable with The following fields/resources can be selected with this field:
[bidding_strategy_simulation](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy_simulation.md.txt)

## bidding_strategy_simulation.start_date

Field descriptionOutput only. First day on which the simulation is based, in YYYY-MM-DD
format.
Category`ATTRIBUTE` Data Type`DATE` Type URL`N/A` FilterableTrue SelectableTrue SortableTrue RepeatedFalse Selectable with The following fields/resources can be selected with this field:
[bidding_strategy_simulation](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy_simulation.md.txt)

## bidding_strategy_simulation.target_cpa_point_list.points

Field descriptionProjected metrics for a series of target CPA amounts.
Category`ATTRIBUTE` Data Type`MESSAGE` Type URL`google.ads.googleads.v24.common.TargetCpaSimulationPoint` FilterableFalse SelectableTrue SortableFalse RepeatedTrue Selectable with The following fields/resources can be selected with this field:
[bidding_strategy_simulation](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy_simulation.md.txt)

## bidding_strategy_simulation.target_roas_point_list.points

Field descriptionProjected metrics for a series of target ROAS amounts.
Category`ATTRIBUTE` Data Type`MESSAGE` Type URL`google.ads.googleads.v24.common.TargetRoasSimulationPoint` FilterableFalse SelectableTrue SortableFalse RepeatedTrue Selectable with The following fields/resources can be selected with this field:
[bidding_strategy_simulation](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy_simulation.md.txt)

## bidding_strategy_simulation.type

Field descriptionOutput only. The field that the simulation modifies.
Category`ATTRIBUTE` Data Type `ENUM`
`BID_MODIFIER``BUDGET``CPC_BID``CPV_BID``PERCENT_CPC_BID``TARGET_CPA``TARGET_IMPRESSION_SHARE``TARGET_ROAS``UNKNOWN``UNSPECIFIED` Type URL`google.ads.googleads.v24.enums.SimulationTypeEnum.SimulationType` FilterableTrue SelectableTrue SortableTrue RepeatedFalse Selectable with The following fields/resources can be selected with this field:
[bidding_strategy_simulation](https://developers.google.com/google-ads/api/fields/v24/bidding_strategy_simulation.md.txt)