Ok.ru

Odnoklassniki, operating under the domain ok.ru, is a Russian-language social networking service originally launched to help former classmates and colleagues reconnect. It targets users across Russia and other Russian-speaking countries in the CIS region, offering profile creation, messaging, and community group features. The platform includes multimedia sharing capabilities, allowing users to upload and stream music, videos, and photos. It also incorporates casual online games and a marketplace-style advertising system for local businesses. Owned by VK (formerly Mail.ru Group), the service functions as one of the major social media platforms in the Russian internet ecosystem, competing with VKontakte for user engagement.