Very important for understanding Russian propaganda:

As I’ve been saying. They try to destroy the very idea of truth.

Also, by working every day to spread Kremlin propaganda, the paid trolls have made it impossible for the normal Internet user to separate truth from fiction.

“The point is to spoil it, to create the atmosphere of hate, to make it so stinky that normal people won’t want to touch it,” Volkov said, when we met in the office of Navalny’s Anti-Corruption Foundation. “You have to remember the Internet population of Russia is just over 50 percent. The rest are yet to join, and when they join it’s very important what is their first impression.” The Internet still remains the one medium where the opposition can reliably get its message out. But their message is now surrounded by so much garbage from trolls that readers can become resistant before the message even gets to them.

www.nytimes.com/2015/06/07/magazine/the-agency.html