Hello,
I've noticed some big ranking downs on important keywords, from the last Google update, and don't really know what seams to be the problem, but have an assumption. In April 2015 we had 3.000.000 pages indexed by Google, and 80% of them had duplicated content for about 90% of it. The site I'm talking about is http://nobelcom.com/. The duplicated content came from variations between calling from and calling to selections, because each of this selection was making a new url (ex. nobelcom.com/caling from/calling to). If "calling from" and calling to were the same country the url was nobelcom.com/calling-from, but after you chosen another calling to, the url become like the one in the example. To solve this I've decided to keep the nobelcom.com/calling-from urls and for different calling to country to display the content trough a javascript, because it was the same, it changed only the country names and the rates. I thought that this change will help us with the duplicate content, and still deliver our client what they are interested in, without affecting the UX, and also reducing the link juice dilution because we had 3.000.000 indexed by Google and most of them with no added value
Can this be the reason for the drops? Now we have 590.000 pages indexed by Google.
