Hello,
My site had a 50% decrease in the last 48 hours (9/26/18) and I looking for ideas/reasons what would cause such a dramatic drop. Year to year organic traffic has been up 40% and September was up 30%. The site has a domain authority of 39 according to Moz and keywords positions have been flat for a few months.
I made a change to the code and robots.txt file on Monday, pre-drop. The category pagination pages had a "NoIndex" with a rel =canonical and I removed the "NoIdnex" per: https://www.seroundtable.com/google-noindex-rel-canonical-confusion-26079.html. I also removed "Disallow" in the robots.txt for stuff like "/?dir" because the pages have the rel =canonical. Could this be the reason for drop??
Other possible reasons:
1. Google Update: I dont think this is it, but ti looks like the last one was August 1st: "Medic" Core Update — August 1, 2018
2. Site was hacked
3. All of keyword positions dropped overnight: I dont think this is it because Bing has also dropped at the same percentage.
Any help, thoughts or suggestions would be awesome.