I saw a drop in traffic of my website in early September 2014.
But, if I check the "Crawl Stats" in Google Webmaster Tools, I see an increase in "Pages Crawled per day" and "Kilobytes downloaded per day".
This is just reverse to traffic drop. Should I be concerned?
I am also seeing daily 20-30 new 500 errors in Google Webmaster Tools despite the fast loading of the website for users.