Conversion statistics from Yandex Metrica.Conversion statistics from Yandex Metrica.
Conclusion:

The campaign results exceeded expectations. The average cost per lead was 356 rubles, and the course completion rate reached 80%. In one month, we attracted 43 new students, which brought the client a net profit of 66,724 rubles after deducting advertising costs. This case shows that even without your own website, you can effectively attract customers and increase sales using properly configured Yandex Direct tools.