Google has improved the measurement of server-to-server conversions. This release aims to recover conversions that were previously undercounted due to a lack of browser cookie context.
Server-side data is now joined with parallel browser signals, such as cookies, when a GCLID is present. This change will allow Floodlight to attribute conversions more accurately, enhancing overall conversion tracking for advertisers.
Find the official announcement here: Improved Measurement of Server-to-Server Conversions.