What were the benefits for Russia in the Molotov-Ribbentrop pact?

The Molotov-Ribbentrop pact gave the Russians an opportunity to further build up their military, to move more factories east of the Urals, and out of the range of Nazi bombers, and to take more territory in the Baltics, in Poland, and in Finland, making it harder for the Nazis to take over most of the USSR. In particular, the thousands of miles of territory taken from Finland in the Russo-Finnish war, gave Leningrad a buffer zone, and probably was the reason the Nazis were unable to conquer Russia’s second most important city. Leningrad had previously been right on the Finnish border, and the Nazis could have taken it immediately. https://www.quora.com/What-were-the-benefits-for-Russia-in-the-Molotov-Ribbentrop-pact