This would allow more coherent region-level data for banner impressions, since otherwise, we only have region as set in the webrequest Hive table, and that may differ from the data CentralNotice actually uses on the client. (On the client we only have the Geo cookie, which can persist when a user travels.)
This task has been assigned to the same task owner for more than two years. Resetting task assignee due to inactivity, to decrease task cookie-licking and to get a slightly more realistic overview of plans. Please feel free to assign this task to yourself again if you still realistically work or plan to work on this task - it would be welcome!
For tips how to manage individual work in Phabricator (noisy notifications, lists of task, etc.), see https://phabricator.wikimedia.org/T228575#6237124 for available options.
(For the records, two emails were sent to assignee addresses before resetting assignees. See T228575 for more info and for potential feedback. Thanks!)