This report shows a list of websites with links that bring traffic to your site. Each site is presented in a tree view diagram. Each branch links to the page that contains the link to your site. By default, all the information is sorted by the number of sessions in descending order, but you can also use other criteria for sorting.
Yandex.Metrica uses the referrer to identify this source. You can also define the traffic source by forming a URL with UTM tags. In this case, you must specify the utm_medium parameter with the referral value. If you want to replace the referrer with your own, use the utm_referrer parameter.