Цель и предназначение

https://russian-odb.org/2020/03/01/%D1%86%D0%B5%D0%BB%D1%8C-%D0%B8-%D0%BF%D1%80%D0%B5%D0%B4%D0%BD%D0%B0%D0%B7%D0%BD%D0%B0%D1%87%D0%B5%D0%BD%D0%B8%D0%B5/