Hi all,
We launched a major update of our site in the middle of June. We have lots of pages and were indexed very quickly, and started ranking well for long tail terms. Last week, our organic traffic suddenly dropped over 60% as our pages started ranking much lower.
One issue we discovered was that our site was responding to all subdomains, not just www, and Google did seem to be crawling two alternate subdomains -- Webmaster Tools shows crawl activity, but no pages indexed on these. We fixed that problem a couple days ago (all subdomains 301 to the www).
Is that something that would have caused a sudden drop like we saw? This would have been an issue since the relaunch, though one of the subdomains only started getting crawled (~1,000 pages/day) in August.
We have investigated a few other things that may have been a factor:
- We sent out a press release via iReach a few weeks ago which makes up the majority of our recent backlinks.
- Our site occasionally returns a 502 no gateway error when under heavy load, Google sees this 3-10 times at day.
- GA shows a page load spike the day before the drop, but we had worse spikes in the past that did not seem to have an impact.
- Did we just get lucky with a "honeymoon" phase with Google?
This is the site: http://goo.gl/3DCbl
Indexing continues -- we now have over 500k pages indexed and Google is crawling faster than ever, about 30,000 pages per day.
Thanks!