Sovietization was a way of life in some countries during the Cold War. It was when a country was influenced by the Soviet Union, which was the main communist country at the time.
In short, with Sovietization, people were expected to do things the way the Soviet Union said. This could mean having a certain type of service in stores, speaking the same language, or having certain ideas about how the government should work. Even people's clothes and haircuts were expected to look a certain way. It was like a way of all being the same.