What Mikhail Gorbachev called his policy of openness?

It was called "glasnost". This policy encouraged people to express their opinion without any fear from the government. It also gave much freedom to the media. After Gorbachev' s Glasnost many musicians throughout Soviet Union emerged with songs about wanting change in society. Band like " Kino" encouraged young people to be open. In all, Gorbachev' s policy brought openness and freedom to old Soviet Union.