Extension:CentralNotice/Buckets

"Buckets" are currently a persistent, A/B mechanism within each campaign. A given user is placed into bucket "A" or "B" using a 1-week browser cookie. If a campaign is bucketing-enabled, then users in bucket "A" will only receive banners in that bucket, and similarly for those in bucket "B". If a campaign is unbucketed, all users can receive the banners regardless of their bucket cookie. See meta:Special:BannerAllocation to see the effects on allocation.