Everybody remembers May 9 2013 when 1st algorithm change happened which was called “Phantom” as the nature of the update was unknown and seems it wants to be unknown as Google officially didn’t announce what update is happening now, but very mysteriously many famous websites’ traffic is going down.
“According to Searchmetrics, which tracks search traffic, there was a clear pattern of a decline in visibility for certain how-to sites, mostly pertaining to those with “thin content,” or lacking much value. HubPages and eHow, owned by Demand Media, are two sites that Searchmetrics identified. WikiHow and Answers.com also saw drops, although not as severe.” (Source: cnbc.com)
Let me know if you website had significant changes in traffic.