I was out to Milan at SES where I presented my perspective on Supplemental results. There wasn't much talk amongst other SEOs which surprised me a bit to be honest. I was approached by a few participants and they are all witnessing the same behavior with Google. Pages are going in and out of the supplemental index. Even good pages, pages with original content, unique title and description tags bla bla bla ...
The fact that pages are falling into the supplemental index could mean that:
- 1 Google is modifying the approach to indexing webisites and will first evaluate your pages before making them available to a more general public (I keep on saying that if you are supplemental then nobody is going to see you)
- 2 There could be a greater attribution (=importance) to external links on a page: before it was the uniqueness of the page that counted, now they could be looking for link juie to keep the page in the main index
Should this be true there will be serious consequences for many