What new Soviet policy allowed for more individual freedom like free speech?

It's called Glasnost, and it was implemented when Gorbachev was premiere of Soviet Russia. There was another policy called Perestroika, which meant restructuring the economy and political system at the time. Perestroika was also implemented when Gorbachev was premiere. If you are studying for a test, it would be a good idea to learn them both (they're often associated with each other).