On February 4, 2021, we announced changes to phrase match and broad match modifier (BMM). As advised in that post, as of today all Google Ads languages have now been updated to use the new phrase match definition. Also as of today, all legacy BMM keywords will continue to serve but will now behave as phrase match keywords. Creation of new BMMs using the legacy BMM notation (+keyword) and modifications to existing BMM keyword text will no longer be permitted as of August 2, 2021 (AdWords API , Google Ads API , Google Ads scripts ).article . As detailed in the article, if you choose to convert BMM keywords to phrase match, performance statistics will not carry over to the new instances. Smart bidding users are encouraged to use the broad match type.keyword matching options .forum . David Wihl , Google Ads API Team
