Hi everyone, this question is a two parter:
I am now working for a large website - over 500k monthly organic traffic. The site currently has both http and https urls in Google's index. The website has not formally converted to https. The https began with an error and has evolved unchecked over time. Both versions of the site (http & https) are registered in webmaster tools so I can clearly track and see that as time passes http indexation is decreasing and https has been increasing. The ratio is at about 3:1 in favor of https at this time. Traffic over the last year has slowly dipped, however, over the last two months there has been a steady decline in overall visits registered through analytics. No single page appears to be the culprit, this decline is occurring across most pages of the website, pages which traditionally draw heavy traffic - including the home page. Considering that Google is giving priority to https pages, could it be possible that the split is having a negative impact on traffic as rankings sway?
Additionally, mobile activity for the site has steadily increased both from a traffic and a conversion standpoint. However that traffic has also dipped significantly over the last two months. Looking at Google's mobile usability error's page I see a significant number of errors (over 1k). I know Google has been testing and changing mobile ranking factors, is it safe to posit that this could be having an impact on mobile traffic?
The traffic declines are 9-10% MOM.
Thank you.
~Geo