How to track which marketing channel originally brought the user to the site?

Question

Google Analytics

In the total number of conversions, a lot of them come from direct visits of visitors who have not come to the site for the first time.
What is the easiest way to track which marketing channel brought the user to the site for the first time?

Answer 1

Conversions - Attribution - Model comparison tool
Select the "First interaction" model and see the statistics.
It is also interesting to look into the "Basic Conversion Funnels"