What was one important decision that Johannes Gutenberg made during his lifetime?

One important decision made by Johannes Gutenberg was the development of the movable type printing press around 1440. This innovation allowed for the mass production of books and written materials, significantly reducing costs and making literature more accessible to the general public. Gutenberg's printing press revolutionized the spread of knowledge, facilitating the Renaissance and the Reformation. His decision to invest in this technology ultimately transformed communication and education in Europe.