aristotle - 3:56 pm on Nov 16, 2013 (gmt 0)
I've seen many threads on this forum where someone reported that pages on their site had been at or near the top of the SERPs for their main keywords for many years, then suddenly overnight fell hundreds of positions, even though there had been no recent changes to the site. If you go to Google's "official" forum, you will see a lot more of these cases than you do here.
Let me ask a question:
If Google consistently ranks a page number 1 for ten years (for its main keyword), then overnight that page falls to number 600, does it mean that for ten years that page was the best result on the web for that query, but now suddenly there are 599 better results?
Google has been working on their algorithm for about 15 years. Yet there are still occasional major shakeups such as Panda and Penguin. I didn't say they should freeze their search results. But after 15 years, you would think there would be more stability. Yes, there would be shifts, but they would be slow and gradual, not sudden and drastic. Something is fundamentally wrong with their approach.