Describe the most important achievements of the French Revolution.

The French Revolution produced many reforms and changes for French citizens. Obviously, the main reform that happened was the removal of the monarchy and the nobility, who were oppressive to the citizens at large. This led to the installation of democracy, taking after the actions of the United States and establishing a constitution.
Some additional reforms that were extremely important were the changes made to land rights and agriculture. While land remained expensive and difficult to acquire, it now became available to all, not simply parceled out to the nobility and distributed as they saw fit. Additionally, changes to agriculture and farming vastly improved the resources for the nation and the earning potential of formerly impoverished farmers, resulting in better lives and eventually, further privatization of land.
http://westerncivguides.umwblogs.org/2011/11/27/accomplishments-of-the-french-revolution/