In December of 2020, there was an addition to the Google ads support page on Gmail Ads. Google announced that dedicated Gmail campaigns will be converted to “read only” on July 1, 2021. Starting on that date, advertisers will not be able to create any more dedicated Gmail campaigns. Also, advertisers will not be able to edit any of their current Gmail campaigns.
If advertisers still want to run any ads on the Gmail placement, they are going to have to run Discovery campaigns instead. That will be the only way to run Gmail campaigns starting on July 1, 2021. This update could be a good way for advertisers to expand reach as well as testing a new campaign type.