Odnoklassniki, more commonly known as OK.ru, is a Russian social network site that connects old friends and classmates. In 2014, the site recorded approximately 15 million mobiles users daily. The site is popular in Russia and former Soviet countries.
OK.ru is owned by Mail.Ru Group, the first largest Internet business online and a top Internet company in Europe. Most of the users are aged between 12 and 64 years, as stated by Mail.Ru Group. Users can join the site for free. The site also has a mobile app that allows users to communicate on the go. OK.ru boasts several accolades, including both Runet and Russian Entertainment Awards.