Previously we announced that, starting on June 30, 2025 , in-app conversions imported through the Google Ads API must include a value for the ClickConversion.conversion_environment 
Now, starting September 30, 2025 , we will begin gradually rolling out a change to our bidding models so that they will start using the presence of the ClickConversion.conversion_environment ClickConversion.conversion_environment 
For developers importing in-app conversions, the following considerations still apply:
In-app conversions are defined as any conversion events that occur within an app, such as purchase, add to cart, or sign up.
 Once this bidding model change is launched to a campaign, if you do not include the conversion_environment  If you do include conversion_environment  The presence or absence of the conversion_environment   
If you have any questions or need help, see the Google Ads API support page  for options.