The cohort semantic meaning is stable, although not disclosed an ML system would learn its correlation to a given goal.
Cohort membership changes pretty frequently instead. So the system may put all people that browse mostly golf sites together in cohort 12345 that only the algorithm knows it's about golf sites, people enter and leave that cohort on a daily basis and you can only be a member of a single cohort at a time.
Cohort membership changes pretty frequently instead. So the system may put all people that browse mostly golf sites together in cohort 12345 that only the algorithm knows it's about golf sites, people enter and leave that cohort on a daily basis and you can only be a member of a single cohort at a time.