Directory Google Guidelines NoFollow 
Adam Sherk
APRIL 3, 2013
However in any implementation it is important to comply with search engine guidelines to avoid negative repercussions for SEO. This topic has been in the news recently with Google first issuing a reminder that any links within sponsored content should not pass PageRank. Sponsored Content Compliance.
Kikolani
DECEMBER 8, 2015
If your website is receiving reduced web traffic or the present strategy in place is not working as efficiently as it once did then you probably have been penalized by Google. Every web portal has to abide by Google’s webmaster guidelines to reach amongst the top ranking in search engine results.
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Techipedia: Tamar Weinberg
DECEMBER 13, 2011
Over the past several years, Google and Bing have released guidelines for webmasters to make websites more crawlable. This is a consolidation of all the guidelines released by Google and Bing over the years to improve onsite optimization. Duplicate content on pages is another way to get on Google’s black list.
Kikolani
OCTOBER 25, 2012
You’ll first want to review the content snippet to make sure it is a good quality (see the guest posting guidelines set by PostJoint ) and the right fit for your blog audience. Unlike other guest blogging and blogger outreach networks, you won’t be added to a searchable directory or database.
ProBlogger
FEBRUARY 14, 2013
Just as low-level article directories (ezinearticles, articlesbase, and others) got hurt by Google’s Panda Update in 2013, I predict that Google will hurt sites abusing guest blogging in 2013. I don’t feel guest blogging is bad, nor that all bloggers who do it will be penalized by Google. Do you notice what the title is?
ProBlogger
AUGUST 15, 2012
Before we get started, I just thought I would mention a few Google algorithm changes that you should know about when thinking about link building in 2012. Google’s Panda update. You can even use the Google Algorithm Change History chart to match a spike in search rankings with a specific Google update.
ProBlogger
JANUARY 15, 2012
There were no search engines and directories were fairly small and specialized. We allow links in the comments, but we nofollow them so no link juice escapes. No, our focus is all on how we can get links back to our own site and build ourselves up in the eyes of Google. There was no central starting point. It has to change.
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