Originally Posted by JesseQuinn

or more precisely...

site:HowCanAWebmasterNotKnowThisAlready.com

if you've been deindexed you can also check in GWT under 'manual actions'

to get reindexed fix the source of the problem and then submit a reconsideration request: https://support.google.com/webmaster...er/35843?hl=en

good luck