VK (short for its original name VKontakte) is a Russian online social media and social networking service based in Saint Petersburg. VK is available in numerous languages but it is especially used by Russian-speakers. VK allows users to message each other publicly or privately; create groups, public pages, and events; share and tag images, audio, and video; and play browser-based games.
As of August 2018, VK had at least 500 million accounts. VK is ranked 15th (as of February 2019) in Alexa's global Top 500 sites. It is the most popular website in Russia. According to SimilarWeb, VK is the 9th most visited website in the world. As of March 2018, VK also ranked as the most popular social networking website in Belarus and Kazakhstan in addition to Russia.