I’ve recently noticed, since around the 20th of October, certain sites are losing visitors. GA dashboard reveals that traffic is decreasing steadily for about a week. And not just a single site. What’s wrong people? Can someone explain? Besides Panda and the usual stuff about contents, etc. has something new turned up? Like some new parameter being introduced in ranking? Or something else?
This is most definitely due to Panda, a "minor" update was rolled out on the 19th/20th Oct see here: http://www.seroundtable.com/google-panda-253-14198.html This is very likely to be the cause for traffic drops you are seeing.
It means that certain adjustments have to be made. The fact remains that there are no fixed theories when it comes to SEO. The best thing you can do is to explore new things and techniques that will make everything good.
The ranking of keywords also down for my site and i believe this is after effects on Google Panda algorithm.