Why does Malevich's Black Square cost so much?

Russian artist Kazimir Malevich painted avant-guard masterpiece The Black Square in 1915.
Since it was first introduced on the exhibition 0,10 (zero-ten), people have been debating: "Is this even art?" and "What's price can we put on a work like this?".
Anna is here to uncover why this painting is so important and answer the most frequently asked questions about Malevich.