Action required: conversion_environment parameter mandated for Offline Conversion Import for apps

Advertisers importing in-app conversions via Offline Conversion Import were told to add the conversion_environment parameter by September 30, 2025 so app conversions attribute correctly and app signals stay enabled in Smart Bidding for web campaigns.

On September 12, 2025 Google updated the page to remove the hard deadline; the parameter is now optional but strongly recommended.