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This is normal. First you need to evaluate this guide: http://www.elite-strategies.com/flavors-types-google-penalties/ and see what kind of penalty you have. Then you need to get all data from Analytics, Search Console both Links and Analytics there. And here is huge analysis... You need to check timeframe of your sudden drop. Are there some turbulence in SERP? New algo released? Anything weird in your own castle (server, CMS, hosting provider, etc)? If there is something - fix it. Also read about algos/turbulences in industry news sites. Check for messages in SearchConsole about "Manual Actions" and fix them if it's any. Check for sudden change of your links and create linking profile. If there are new and weird links from spammy sources - disavow them ASAP. If there is overoptimization for keywords - change anchor or disavow. This can be something Penguin algo related. Check for sudden change of your site - thin content, aggregated content, duplicate, irrevelant, etc. Check also user signals - low CTR, high bounce rate, low time on site and low % of returning users. Also check bad UI - design, navigation, mobile redirects, site speed, ads. Check for low trustworthiness - in Google Raters Handbook that was recently released. This can be - providing contact information, ToS, PP, etc. And last - overoptimization. This can be something to Panda algo related. Check for other algorithms - like TopHeavy aka Page Layout Algorithms that may affect your site. So after you know what can be your drop related then check and recheck. Isn't first nor last time when you can think about Panda but in reality was Penguin or vice versa. This can save you few months. After you're 100% sure what was then try to make changes to escape from algo penalty. Same happens to me almost year and half. We're running brand new site and faced sandbox algo. But we make few links more than we should and from low quality sites. So site was shown in SERP for month in first or second page and then suddenly drop to 10 page. Our organic traffic was fell to 1/10 of before almost overnight. But we make new traffic sources - social media and referral traffic so we could live without organic. We change links, make diversify linking profile changing links, anchors or even both. We also delete some links. But nothing happen in SERP position. Then i use disavow tool and 2 weeks ago there was algo refresh (Penguin). Almost overnight search traffic jump more than 10x and recovering previous positions and getting new and ever better positions. Today - this site make traffic as 10x than after recovering. The problem is that you need to make changes in site against penalty. And wait for algo refresh. You also need huge patience because some drop can happen anytime, but for recovering you need algo refreshes. And refreshes take months or even years.

Hey, I don't think there is any such tool exist yet, you have to do this manually. Umar

Thanks guys. Can anyone recommend an SEO company who has a good reputation for managing this type of monthly maintenance service?

_For each subdomain (es.example.com/blah-blah for this example), I need to place the hreflang tag pointing to the page the subdomain is on (es.example.com/blah-blah), in addition to every other 28 subdomains that have that page (it.example.com/blah-blah, etc). In addition, I need to place a canonical tag pointing to the main www. version of the website. So I would have 29 hreflang tags, plus a canonical tag. _ Everything correct but the canonical part (but maybe I misunderstood what you wrote). If the different country targeting pages are in different languages, then you don't have to point the rel="canonical" to the main www. version. NOT AT ALL, because they are not identical. You will start seeing the search snippets of the URLs of those geo-targeted versions (shown because of the hreflang) using the title tag and meta description of the www. version page. So, for instance, the search snippet of the Italian version having the Italian URL but everything else in English. If you need to use the rel="canonical" it should be self-referential (if not another in same cases, but of the same subdomain)

This post last year gives a good answer throughout.  In summary yes it does but the edge gets taken off the link 'power', just as a 301 doesn't pass 100% http://moz.com/community/q/noindex-follow-is-a-waste-of-link-juice

Without getting too technical, .htaccess might be the solution you are looking for. This will allow you to retain both websites and transfer your organic traffic without risk of penalty. You can find .htaccess commands in the link below: http://kb.mediatemple.net/questions/85/Using+.htaccess+rewrite+rules#gs/-httpexamplecomfolder1-to-httpexamplecomfolder2-- At the end of the day, you can insert the following into the .htaccess on your web hosting: Redirect 301 /url1 (Website B) http://www.newsite.com/url1 (Website A) Redirect 301 /url2 (Website B) http://www.newsite.com/url2 (Website A) Redirect 301 /url3 (Website B) http://www.newsite.com/url3 (Website A) Redirect 301 /url4 (Website B) http://www.newsite.com/url4 (Website A) If you are looking for a redirection tool without needing .htaccess (and are using wordpress), I have found that this one works wonders: https://wordpress.org/plugins/redirection/ Either way, I don't think there is much to worry about in regards to risking negative effects as long as you are not transferring urls with penalties on them already.