Recently Google announced it was targetting content farms in their recent algorithmic changes which affects about 11% of their search results.

The Google blog says: “This update is designed to reduce rankings for low-quality sites—sites which are low-value add for users, copy content from other websites or sites that are just not very useful.”

According to Sistrix, an independent keyword and SERPS research company, the biggest five losers are:

• wisegeek.com
• ezinearticles.com
• suite101.com
• hubpages.com
• yourdictionary.com

Other sites listed that online marketers might be familiar with include articlesbase.com (down 94%) Slideshare.net (down 56%) and PRnewswire.com (-91%)

It’s worth noting that ehow.com has not been affected by the changes. Ehow.com even gained SISTRIX value (from 270 to 310) and Keywords (from 317,320 to 324,021) during the algorithm-change.

This update is currently only in the US but other countries will follow.