Unleash dragons. Replaces selected words with different words. Just forget you even have this installed. No mercy.
A continuously adjusted list for words and phrases that are randomly and subtly replaced as you read some major news websites. That sort of thing. Don't worry about it. Just forget you even have this installed.
Those sites currently are;
CNN, NYTimes, Washington Post, Wall Street Journal, The Atlantic, and The Atlantic Wire, The Guardian, BBC, NBC, USA Today, ABC News, Reuters, LATimes, Huffington Post, ProPublica, Yahoo News.