Facebook will bury links to low-quality websites and refuse to carry ads pointing to them in a News Feed algorithm change announced today. Facebook defines a “low-quality site” as one “containing little substantive content, and that is covered in disruptive, shocking or malicious ads.” This includes hosting pop-up and interstitial ads, adult ads or eye-catching but disgusting ads for products that fight fat or foot fungus.

Source: Facebook downranks News Feed links to crappy sites smothered in ads | TechCrunch