Google last month announced that message extensions will be sunset in AdWords and Google Ads APIs and Google Ads scripts. The sunset date is January 27, 2020.
According to Google, after January 27, message extensions will no longer serve, users will not be able to create new message extensions or update existing extensions, but will still be able to retrieve data for existing message extensions until the end of 2020. Advertisers will also be able to remove the existing message extensions until the end of 2020.
Google Ads scripts that will also retrieve an error with message extensions: “Cannot operate on deprecated placeholder type.”
Thanet Knack Praneenararat, from Google Ads API Team, recommended advertisers to “ensure that programs don’t contain any code trying to create or update message extensions after the sunset date.”