Choosing the right marketing channels is the eternal problem for all marketers.
There is no tracking of customers in any way.
Works just as well for offline channels as for digital marketing, and gives a holistic view of your marketing performance.
Get recommended channel mix and simulate forecasted effect when planning your marketing activities.
Models are updated when new data becomes available.
Combine what you know from experience, previous experiments and attribution modeling with the statistical approach.
All model predictions comes with uncertainty estimates.