Basic knowledge of Treasure Data
Validate that you want to track 3rd party cookies from web browsers that allow them
Treasure Data’s Cross Domain Tracking relies on 3rd party cookie mechanism. For more details, see Anonymous IDs. It’s particularly important to understand the limitation of 3rd party cookies because it doesn’t work for Mobile and PC Safari browsers.
Enabling Cross-Domain Tracking
Call td.set('$global', 'td_global_id', 'td_global_id'); to enable the feature.
This line adds an additional column called td_global_id to the destination table.
Optionally, review Sessionization functions to count sessions in: