GOOGLE ADS WILL AUTOMATICALLY START PAUSING AD GROUPS WITH LOW ACTIVITY

Summary from the TLDR Marketing newsletter

Google ad groups created at least 13 months ago that have not had impressions in the past 13 months will be paused starting from March 11. Advertisers can turn them back on if needed, but unpaused ad groups without any impressions in the following three months will be automatically paused again. This change is designed to improve budget efficiency and campaign quality for advertisers.