in several time ago in oktober 2017 my site has been hacked by “Japan SEO Hack” all meta discription in japan language.
deindex in several time from oktober until this month april 2018 so my adsense earning drop and almost zero.
all article and google group also suggest to cek manual action and request ” consideration request”. but in my case there is no manual action spam etc.
all file new why it happen?
simple way is “disavow link”
step by step
google search console
sometimes you must add your property in your google search console. google search console history is always show thus your property became another property in another account.
check your link in your google search console. click more to see detail. analyse this backlink.
in google pinguin update algoritm Penguin Update in April 2012 to better catch sites deemed to be spamming its search results, in particular those doing so by buying links or obtaining them through link networks designed primarily to boost Google rankings. When a new Penguin Update is released, sites that have taken action to remove bad links New sites not previously caught might get trapped by Penguin. “False positives,” sites that were caught by mistake, may escape.
so always chack your backlink. because this backlink may be reason of your deindex.
use diavow tool to do that
select your site and click diavow link
prepare your link in notepad because you ust upload your link in txt file
for domain you must text domain in front of your domain.
save in name that you want pload and aproximately in few day so be patien
i proof this step and in 3 day my site has been indexed again