Counting Users

Counting Unique Users (browsers)

ASX uses hyperloglog structures to store unique users Ids and count unique users. Unique users are counted for

• Campaign overview (Campaign total)
• Insights (Selected dates)
• Segments (Last 60 days)
• Cookie Groups (Last 60 days)
• Sites (Last 60 days)
• Site lists (Last 60 days)
• Audiences (Last 60 days)

Segments

The occurrence of users belonging to segments on sites is added at a 5 %  sample rate.

Event	Segment Size	Segment Seen on Site Size
Segment Tag	100 %	N/A
Bid Request	0 %	5 %
Impression	0 %	0 %

Cookie Group

The occurrence of users belonging to cookie groups on sites is added at a 5 % sample rate.

Event	Cookie Group Size	Cookie Group Seen on Site Size
Cookie Group Tag	100 %	N/A
Bid Request	0 %	5 %
Impression	0 %	0 %
Server 2 Server Import	100 %	0 %

Audience

Audience sizes are approximated based on activity on underlying segments and cookie groups. Audience sizes may therefore be bigger than estimated, as other targets (such as Data Lists) currently do not trigger an insertion of users in the structure. 

Currently, the API endpoints used to estimate the presence of a given audience on a given site, is based on sets specific to each site and audience pair being populated with seen users as time progresses. 

Event	Audience Size	Audience Seen on Site Size
Segment Tag	100 % for audiences belonging to account	N/A
Cookie Group Tag	100 % for audiences belonging to account	N/A
Bid Request	Account setting, contact account mgr	Account setting, contact account mgr
Impression	Account setting, contact account mgr	Account setting, contact account mgr
Server 2 Server Import	100 % for audiences that equal Cookie Group Key+Value	N/A