Choosing the Google paid channels attribution setting lets you see conversions from Google Ads in your Google Analytics conversion reports. If you choose paid and organic channels, you can report on conversions from both paid and organic sources in Google Analytics, providing a broader, cross-channel view of your conversions beyond Google Ads paid channels.
Changing this setting applies going forward and to all linked Google Ads accounts. It may impact the conversions you create in Google Ads for bidding and reporting. These changes may take a few days before they're reflected in your Google Ads campaigns and reports.
Note: Paid and organic channels only applies to web conversions; app conversions always use Google paid channels.