About mapping STO tables

For Send time optimization feature, Deliver will populate best send time of each user being targeted via Deliver in a table called as UACE_STO_METRICS and Campaign will use this time to populate OLT.

Since identification of user in Campaign is based on AudienceLevel, so this table needs to be AudienceLevel specific. User needs to create this table per audience level and map it under Campaign Settings -> Manage Audience levels section. This table needs to have audience id fields and STO calculation related fields.

If you are not using send time optimization

Using send time optimization feature in Campaign flowchart is optional. If you are not using Send time optimization features in flowcharts, the best practice is that you do not map the send time optimize table. Mapping send time optimization system table causes Unica Campaign to add two new columns 'preferredSendTime' and 'TimeZone' in deliver's OLT table. This is unnecessary processing overhead if you are not using send time optimization feature.