The Russian Revolution of 1917 was a complex worldwide shattering event, as was the French Revolution launched 1789, and occurred in two stages.
The history of the Russian Revolution is complex and highly controversial. In my opinion, the best outsider account is that by American journalist John Reed (played by Warren Beatty in the film "Reds") who wrote the fairly slim volume Ten Days That Shook the World. The best insider account, Leon Trotsky's History of the Russian Revolution, includes hilarious inside-jokes but is, I regret, three volumes.
In March 1917 there was effectively a palace coup. Russia was losing its front in World War I and the establishment and some reformists thought the Tsar had to go. Thus far it was a bourgeois revolt.
The French word "bourgeois" originally meant the inhabitants of an urbanized and incorporated borough, “bourg.” The bourgeois were the new class of city merchants that developed starting in the Renaissance, when urban life revived in Europe at the birth of capitalism; Marx extended the term to refer to the new class of investors, entrepreneurs, managers and white collar workers that emerged with industrialization, which he called the bourgeoisie, effectively comfortable people of the cities.
The February Revolution (March in modern calendars) was bourgeois in the sense that it was not a popular outburst. It was primarily the establishment exasperated with a backward monarch who thought he could beat back the modern German army with the same cavalry that had defeated Napoleon (although what Joseph Stalin would call “General Winter” had a lot more to do with the 19th-century victory than Cossacks).
There was no social or economic change intended by the provisional government, which decided to continue to abide by its obligations to the western Allies and continue the highly unpopular war. Peasants and workers perceived that they were fighting for the benefit of the wealthy.
